Plagiarists are always suspicious of being stolen from.

Metaphysics,--the science which determines what can and what cannot be known of being and the laws of being.

A single thought is that which it is from other thoughts as a wave of the sea takes its form and shape from the waves which precede and follow it.

To carry feelings of childhood into the powers of adulthood, to combine the child's sense of wonder and novelty with the appearances which every day for years has rendered familiar, this is the character and privilege of genius, and one of the marks which distinguish it from talent.

To doubt has more of faith ... than that blank negation of all such thoughts and feelings which is the lot of the herd of church-and-meeting trotters.

The genius of the Spanish people is exquisitely subtle, without being at all acute; hence there is so much humour and so little wit in their literature.

Veracity does not consist in saying, but in the intention of communicating the truth.