Dogmas of every kind put assertion in the place of reason and give rise to more contention, bitterness, and want of charity than any other influence in human affairs.

We surely know by some nameless instinct more about our futures than we think we know.

Any truth is better than indefinite doubt.

Desultory readers are seldom remarkable for the exactness of their learning.

There are heroisms all round us waiting to be done.

My dear Watson," said [Sherlock Holmes], "I cannot agree with those who rank modesty among the virtues. To the logician all things should be seen exactly as they are, and to underestimate one's self is as much a departure from truth as to exaggerate one's own powers.

Before turning to those moral and mental aspects of the matter which present the greatest difficulties, let the inquirer begin by mastering more elementary problems.