To give a reason for anything is to breed a doubt of it.

Do not keep on with a mockery of friendship after the substance is gone - but part, while you can part friends. Bury the carcass of friendship: it is not worth embalming.

Reflection makes men cowards.

In public speaking, we must appeal either to the prejudices of others, or to the love of truth and justice. If we think merely of displaying our own ability, we shall ruin every cause we undertake.

The definition of genius is that it acts unconsciously, and those who have produced immortal works have done so without knowing how or why.

Belief is with them mechanical, voluntary: they believe what they are paid for - they swear to that which turns to account. Do you suppose, that after years spent in this manner, they have any feeling left answering to the difference between truth and falsehood?

Common sense, to most people, is nothing more than their own opinions.