Wicked thoughts and worthless efforts gradually set their mark on the face, especially the eyes.

[T]he moralists of Europe [have] pretended that beasts have no rights... a doctrine revolting/gross/barbarous... on which a native of the Asiatic uplands could not look without righteous horror.

Every human perfection is allied to a defect into which it threatens to pass, but it is also true that every defect is allied to a perfection.

As the strata of the earth preserve in succession the living creatures of past epochs, so the shelves of libraries preserve in succession the errors of the past and their expositions, which like the former were very lively and made a great commotion in their own age but now stand petrified and stiff in a place where only the literary palaeontologist regards them.

A reproach can only hurt if it hits the mark. Whoever knows that he does not deserve a reproach can treat it with contempt.

A man's knowledge may be said to be mature, in other words, when it has reached the most complete state of perfection to which he, as an individual, is capable of bringing it, when an exact correspondence is established between the whole of his abstract ideas and the things he has actually perceived for himself. His will mean that each of his abstract ideas rests, directly or indirectly, upon a basis of observation, which alone endows it with any real value; and also that he is able to place every observation he makes under the right abstract idea which belongs to it.

After your death you will be what you were before your birth.