What really raises one's indignation against suffering is not suffering intrinsically, but the senselessness of suffering

We must remain as close to the flowers, the grass, and the butterflies as the child is who is not yet so much taller than they are.

Every step forward is made at the cost of mental and physical pain to someone.

In order to acquire intellect one must need it. One loses it when it is no longer necessary.

Man, however, is the most courageous animal: thereby has he overcome every animal. With sound of triumph has he overcome every pain; human pain, however, is the sorest pain.

Let us guard against saying that there are laws in nature. There are merely necessities: there is no one who commands, no one whoobeys, no one who transgresses. Once you understand that there are no purposes, then you also understand that nothing is accidental: for it is only in a world of purposes that the word "accident" makes sense.

Growth in wisdom can be measured precisely by decline in bile.