All this struggling and striving to make the world better is a great mistake. Not that it's wrong to try to improve the world if you know how but simply because struggling and striving are the worst possible ways to go about doing anything!

The sound body is the product of the sound mind.

Even if animal experimentation was proved to be of value, it would be morally wrong.

The average age (longevity) of a meat eater is 63. I am on the verge of 85 and still work as hard as ever. I have lived quite long enough and am trying to die; but I simply cannot do it. A single beef-steak would finish me; but I cannot bring myself to swallow it. I am oppressed with a dread of living forever. That is the only disadvantage of vegetarianism.

We must not stay as we are, doing always what was done last time; or we shall stick in the mud.

Men get tired of everything, of heaven no less than of hell; and that all history is nothing but a record of the oscillations of the world between these two extremes. An epoch is but a swing of the pendulum; and each generation thinks the world is progressing because it is always moving.

Spend all you have before you die, and do not outlive yourself.