To behold is not necessarily to observe, and the power of comparing and combining is only to be obtained by education. It is much to be regretted that habits of exact observation are not cultivated in our schools; to this deficiency may be traced much of the fallacious reasoning and the false philosophy which prevails.

Redundancy of language is never found with deep reflection. Verbiage may indicate observation, but not thinking. He who thinks much, says but little in proportion to his thoughts. He selects that language which will convey his ideas in the most explicit and direct manner. He tries to compress as much thought as possible into a few words. On the contrary, the man who talks everlastingly and promiscuously, who seems to have an exhaustless magazine of sound, crowds so many words into his thoughts that he always obscures, and very frequently conceals them.

I hold it that a little rebellion now and then is a good thing, and as necessary in the political world as storms in the physical. Unsuccessful rebellions, indeed, generally establish the encroachments on the rights of the people which have produced them. An observation of this truth should render honest republican governors so mild in the punishment of rebellions as not to discourage them too much. It is a medicine necessary for the sound health of government.

Novelty is indeed necessary to preserve eagerness and alacrity; but art and nature have sores inexhaustible by human intellects; and every moment produces something new to him who has quickened his faculties by diligent observation.

Experience: in that all our knowledge is founded; and from that it ultimately derives itself. Our observation employed either about external or sensible objects or about the internal operations of our minds, perceived and reflected on by ourselves, is that which supplies our understandings with all the materials of thinking.

Knowledge is acquired by study and observation, but wisdom cometh by opportunity of leisure; the ripest thought comes from the mind which is not always on the stretch, but fed, at times, by a wise passiveness.

The pedagogical method of observation has for its base the liberty of the child, and liberty is activity... Discipline must come through liberty.

Excellence is never granted to man, but as the reward of labor. It argues, indeed, no small strength of mind to persevere in the habits of industry, without the pleasure of perceiving those advantages which, like the hands of a clock, whilst they make hourly approaches to their point, yet proceed so slowly as to escape observation.

Presence of mind, penetration, fine observation, are the sciences of women; ability to avail themselves of these is their talent.

It is the close observation of little things which is the secret of success in business, in art, in science, and in every pursuit in life. Human knowledge is but an accumulation of small facts, made by successive generations of men, the little bits of knowledge and experience carefully treasured up and growing at length into a mighty pyramid.

The theory that can absorb the greatest number of facts, and persist in doing so, generation after generation, through all changes of opinion and of detail, is the one that must rule all observation.

Perhaps there is no property in which men are more distinguished from each other, than in the various degrees in which they possess the faculty of observation. The great herd of mankind pass their lives in listless inattention and indifference as to what is going on around them, being perfectly content to satisfy the mere cravings of nature, while those who are destined to distinction have lynx-eyed vigilance that nothing can escape.

The kingdom of God cometh not with outward observation, neither shall they say lo, here, or lo, there it is; for behold, the kingdom of God is within you.

An independent reality in the ordinary physical sense can neither be ascribed to the phenomenon nor to the agencies of observation.

The Kingdom of Heaven cometh not by observation. It comes by the appreciation of the signs of the presence and power of God in our inner experience.

Materialism assumes a line of `continuity’ running through the whole scheme of nature, despite its obvious gaps; on the contrary, he underlines the significance of `discontinuity’ as positive evidence of the intervention of a higher source of influence which escapes man’s limited `scale of observation.’ A giant or a microbe would, with similar intelligence, observe the same phenomenon differently; they might be guided by their scales of observation to different, or at least, to modified conclusions. There is no scientific truth in an absolute sense. The phrase Ad veritatem per scientiam is an absurdity.

Hope is a state of mind, not of the world. Hope, in this deep and powerful sense, is not the same as joy that things are going well, or willingness to invest in enterprises that are obviously heading for success, but rather an ability to work for something because it is good… Either we have hope or we don't; it is a dimension of the soul, and it's not essentially dependent on some particular observation of the world or estimate of the situation. Hope is not prognostication. It is an orientation of the spirit, and orientation of the heart; it transcends the world that is immediately experienced, and is anchored somewhere beyond its horizons… Hope, in this deep and powerful sense, is not the same as joy that things are going well, or willingness to invest in enterprises that are obviously heading for success, but rather and ability to work for something because it is good, not just because it stands a chance to succeed. The more propitious the situation in which we demonstrate hope, the deeper the hope is. Hope is definitely not the same thing as optimism. It is not the conviction that something will turn out well, but the certainty that something makes sense, regardless of how it turns out.

Reading, reflection and time have convinced me that the interests of society require the observation of those moral precepts only in which all religions agree (for all forbid us to murder, steal, plunder, or bear false witness) and that we should not intermeddle with the particular dogmas in which all religions differ, which are totally unconnected with morality.

To be fruitful in invention, it is indispensable to have a habit of observation and reflection.

Where observation is concerned, chance favors only the prepared mind.