In everyone's life, at some time, our inner fire goes out. It is then burst into flame by an encounter with another human being. We should all be thankful for those people who rekindle the inner spirit.

If we do not hang together, we will all hang separately.

The only thing that will redeem mankind is cooperation.

We are all dependent on one another, every soul of us on earth.

There is the sky, which is all men's together.

The moral duty to be expected in different ages is not a unity of standard, or of acts, but a unity of tendency. At one time the benevolent affections embrace merely the family, soon the circle expanding includes first a class, then a nation, then a coalition of nations, then all humanity and finally, its influence is felt in the dealings of man with the animal world.

We are all of us, more or less, the slaves of opinion.

We are not put on this earth to see through one another, but to see one another through.

A hundred times every day I remind myself that my inner and outer life depend on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving.

Let everyone sweep in front of his own door, and the whole world will be clean.