Men of different tastes have different pursuits.

It is graceful in a man to think and to speak with propriety, to act with deliberation, and in every occurrence of life to find out and persevere in the truth. On the other hand, to be imposed upon, to mistake, to falter, and to be deceived, is as ungraceful as to rave or to be insane.

The freedom of poetic license.

Philosophy is true mother of the arts [of science].

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

For books are more than books, they are the life, the very heart and core of ages past, the reason why men worked and died, the essence and quintessence of their lives.

Advice in old age is foolish; for what can be more absurd than to increase our provisions for the road the nearer we approach to our journey's end.