The true voyage of discovery is not a journey to a new place; it is learning to see with new eyes.

But sometimes illumination comes to our rescue at the very moment when all seems lost; we have knocked at every door and they open on nothing until, at last, we stumble unconsciously against the only one through which we can enter the kingdom we have sought in vain a hundred years - and it opens.

The tiny, initial clue ... by allowing us to imagine what we do not know, stimulates a desire for knowledge.

Let us be grateful to people who make us happy.

But to ask pity of our body is like discoursing in front of an octopus, for which our words can have no more meaning than the sound of the tides, and with which we should be appalled to find ourselves condemned to live.

Man is the creature that cannot emerge from himself, that knows his fellows only in himself; when he asserts the contrary, he is lying.

Everything that seems imperishable tends to extinguishment.