In my view, aiming at simplicity and lucidity is a moral duty of all intellectuals: lack of clarity is a sin, and pretentiousness is a crime.

It is no more natural and no less conventional to shout in anger or to kiss in love than to call a table 'a table'. Feelings and passional conduct are invented like words. Even those which like paternity seem to be part and parcel of the human make-up are in reality institutions. It is impossible to superimpose on man a lower layer of behavior which one chooses to call 'natural' followed by a manufactured cultural or spiritual world. Everything is both manufactured and natural in man as it were in the sense that there is not a word, not a form of behavior which does not owe something to purely biological being and which at the same time does not elude the simplicity of animal life and cause forms of vital behavior to deviate from their pre-ordained direction through a sort of leakage and through a genius for ambiguity which might serve to define man.

All great rebellions are born of private acts of civil disobedience that inspire rebel bands to plot together. And so there is now a new revolution under way, one aimed at rolling back the almost comical overprotectiveness and overinvestment of moms and dads. The insurgency goes by many names — slow parenting, simplicity parenting, free-range parenting — but the message is the same: Less is more; hovering is dangerous; failure is fruitful. You really want your children to succeed? Learn when to leave them alone. When you lighten up, they'll fly higher. We're often the ones who hold them down.

For if as scientists we seek simplicity, then obviously we try the simplest surviving theory first, and retreat from it only when it proves false. Not this course, but any other, requires explanation. If you want to go somewhere quickly, and several alternate routes are equally likely to be open, no one asks why you take the shortest. The simplest theory is to be chosen not because it is the most likely to be true but because it is scientifically the most rewarding among equally likely alternatives. We aim at simplicity and hope for truth.

God's simplicity precedes both all that can be named and all that cannot.

Since God is not knowable in this world, where reason, opinion, and teaching lead us, by means of symbols, from the better known to the unknown, God is grasped only where persuadings leave off and faith enters in. Through faith we are rapt in simplicity so that, while in a body incorporeally, because in spirit, and in the world not in a worldly manner but celestially.

A line partakes of the simplicity of a point more than does a surface; and a surface [partakes thereof more] than does a material object—as was evident. From this consideration of a point and a material object elevate yourself unto a likeness of True Being and of the universe; and by means of [this] quite clear symbolism [of a point] make a conjecture about what has been said.

You know how the divine Simplicity enfolds all things. Mind is the image of this enfolding Simplicity. If, then, you called this divine Simplicity infinite Mind, it will be the exemplar of our mind. If you called the divine mind the totality of the truth of things, you will call our mind the totality of the assimilation of things, so that it may be a totality of ideas. In the divine Mind conception is the production of things; in our mind conception is the knowledge of things. If the divine Mind is absolute Being, then its conception is the creation of beings; and conception in the human mind is the assimilation of beings.

The research worker, in his efforts to express the fundamental laws of Nature in mathematical form, should strive mainly for mathematical beauty. He should take simplicity into consideration in a subordinate way to beauty... It often happens that the requirements of simplicity and beauty are the same, but where they clash, the latter must take precedence.

Unnecessary possessions are unnecessary burdens. If you have them, you have to take care of them! There is great freedom in simplicity of living. It is those who have enough but not too much who are the happiest.

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence that at a given instant comprehends all the relations of the entities of this universe, it could state the respective position, motions, and general effects of all these entities at any time in the past or future. Physical astronomy, the branch of knowledge that does the greatest honor to the human mind, gives us an idea, albeit imperfect, of what such an intelligence would be. The simplicity of the law by which the celestial bodies move, and the relations of their masses and distances, permit analysis to follow their motions up to a certain point; and in order to determine the state of the system of these great bodies in past or future centuries, it suffices for the mathematician that their position and their velocity be given by observation for any moment in time. Man owes that advantage to the power of the instrument he employs, and to the small number of relations that it embraces in its calculations. But ignorance of the different causes involved in the production of events, as well as their complexity, taken together with the imperfection of analysis, prevents our reaching the same certainty about the vast majority of phenomena. Thus there are things that are uncertain for us, things more or less probable, and we seek to compensate for the impossibility of knowing them by determining their different degrees of likelihood. So it was that we owe to the weakness of the human mind one of the most delicate and ingenious of mathematical theories, the science of chance or probability.

The simplicity of nature is not to be measured by that of our conceptions. Infinitely varied in its effects, nature is simple only in its causes, and its economy consists in producing a great number of phenomena, often very complicated, by means of a small number of general laws.

It is India that gave us the ingenious method of expressing all numbers by means of ten symbols, each symbol receiving a value of position as well as an absolute value a profound and important idea which appears so simple to us now that we ignore its true merit. But its very simplicity and the great ease which it has lent to computations put our arithmetic in the first rank of useful inventions and we shall appreciate the grandeur of the achievement the more when we remember that it escaped the genius of Archimedes and Apollonius, two of the greatest men produced by antiquity.

Variety in poetry breeds self-indulgence; in gymnastics, disease: simplicity there puts temperance in the soul; here it puts health in the body.

Our evangelizing zeal must spring from true holiness of life, and, as the Second Vatican Council suggests, preaching must in its turn make the preacher grow in holiness, which is nourished by prayer… The world which, paradoxically, despite innumerable signs of the denial of God, is nevertheless searching for Him in unexpected ways and painfully experiencing the need of Him- the world is calling for evangelizers to speak to it of a God whom the evangelists themselves should know and be familiar with as if they could see the invisible. The world calls for and expects from us simplicity of life, the spirit of prayer, charity towards all, especially towards the lowly and the poor, obedience and humility, detachment and self-sacrifice. Without this mark of holiness, our word will have difficulty in touching the heart of modern man. It risks being vain and sterile.

A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended is its area of applicability. Therefore the deep impression which classical thermodynamics made upon me. It is the only physical theory of universal content concerning which I am convinced that within the framework of the applicability of its basic concepts, it will never be overthrown.

It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity in the foundations of physical theory.

Always the wish that you may find patience enough in yourself to endure, and simplicity enough to believe; that you may acquire more and more confidence in that which is difficult, and in your solitude among others.

It is always what I have already said: always the wish that you may find patience enough in yourself to endure, and simplicity enough to believe; that you may acquire more and more confidence in that which is difficult, and in your solitude among others. And for the rest, let life happen to you. Believe me: life is right, in any case.

May you find in yourself enough patience to endure and enough simplicity to have faith.