To make our nervous system our ally instead of our enemy… we must make automatic and habitual, as early as possible, as many useful actions as we can, and guard against the growing into ways that are likely to be disadvantageous to us, as we should guard against the plague.

Poverty is a great enemy to human happiness; it certainly destroys liberty, and it makes some virtues impracticable and others extremely difficult.

Resolve not to be poor, whatever you have, spend less. Poverty is a great enemy to human happiness, it certainly destroys liberty, and it makes some virtues impracticable, and others extremely difficult.

What if I should discover that the poorest of the beggars and the most impudent of offenders are all within me, and that I stand in need of the alms of my own kindness; that I myself am the enemy who must be loved – what then?

The source of peace is within us; so also the source of war. And the real enemy is within us, and not outside. The source of war is not the existence of nuclear weapons or other arms. It is the minds of human beings who decide to push the button and to use those arms out of hatred, anger or greed.

The great enemy of the soul is not trial but sadness, which is the bleeding wound of self-love.

The face of the enemy frightens me only when I see how much it resembles mine.

The advantages of the enemy will have little value if we permit them to impair our resolution.

The best way to destroy an enemy is to make him a friend.

In frontless war where there are no clear lines on the map to show victory and defeat, the only true measure of progress must be political and nonquantifiable: the impact on the enemy’s will to continue the fight.

Any manifest error on the part of an enemy should make us suspect some stratagem.

A prince is further esteemed when he is a true friend or a true enemy, when, that is, he declares himself without reserve in favor of some one or against another. This policy is always more useful than remaining neutral.

After you get your freedom, your enemy will respect you.

Complacency is the enemy. We cannot really learn anything until we rid ourselves of complacency. Our attitude towards ourselves should be “insatiable in learning” and towards others to be “tireless in teaching.”

He that would make his own liberty secure must guard even his enemy from oppression; for if he violates this duty he establishes a precedent that will reach to himself.

The animosity which Nations reciprocally entertain is nothing more than what the policy of their Governments excites to keep up the spirit of the system. Each Government accuses the other of perfidy, intrigue, and ambition, as a means of heating the imagination of their respective Nations, and incensing them to hostilities. Man is not the enemy of Man, but through the medium of a false system of Government.

True religion is a revolutionary force: it is an inveterate enemy of oppression, privilege, and injustice.

Cerebration is the enemy of originality in art.

Idleness is the enemy of the soul. And therefore, at fixed times, the brothers ought to be occupied in manual labour; and again, at fixed times, in sacred reading.