Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abysses nature leads, or you shall learn nothing. I have only begun to learn content and peace of mind since I have resolved at all risks to do this.
Try to learn something about everything and everything about something.
I am too much of a skeptic to deny the possibility of anything.
What we call rational grounds for our beliefs are often extremely irrational attempts to justify our instincts.
The man of science has learned to believe in justification, not by faith, but by verification.
For once reality and his brains came into contact and the result was fatal.
The scientific spirit is of more value than its products, and irrationally held truths may be more harmful than reasoned errors.
History warns us ... that it is the customary fate of new truths to begin as heresies and to end as superstitions.
Those who are ignorant of Geology, find no difficulty in believing that the world was made as it is; and the shepherd, untutored in history, sees no reason to regard the green mounds which indicate the site of a Roman camp, as aught but part and parcel of the primeval hill-side.