As soon as man applies his intelligence to any object at all, he unfailingly destroys the object.

Life consists in penetrating the unknown, and fashioning our actions in accord with the new knowledge thus acquired.

In infinite time, in infinite matter, in infinite space, is formed a bubble organism, and that bubble lasts a while and bursts, and that bubble is Me.

The feeling of patriotism - It is an immoral feeling because, instead of confessing himself a son of God . . . or even a free man guided by his own reason, each man under the influence of patriotism confesses himself the son of his fatherland and the slave of his government, and commits actions contrary to his reason and conscience.

What I think about vivisection is that if people admit that they have the right to take or endanger the life of living beings for the benefit of many, there will be no limit to their cruelty.

There is no greatness where there is no simplicity, goodness and truth.

It is not enough to be a hardworking person. Think: what do you work at?