“Everybody liked better to conjecture how the thing was, than simply to know it; for conjecture soon became more confident than knowledge, and had a more liberal allowance for the incompatible.”

“But of course these conjectures as to why God does what He does are probably of no more value than my dog's ideas of what I am up to when I sit and read.”

“That human life is but a first installment of the serial soul and that one's individual secret is not lost in the process of earthly dissolution, becomes something more than an optimistic conjecture, and even more than a matter of religious faith, when we remember that only commonsense rules immortality out.”

“In the discovery of secret things, and in the investigation of hidden causes, stronger reasons are obtained from sure experiments and demonstrated arguments than from probable conjectures and the opinions of philosophical speculators.”

“If knowledge does not liberate the self from the self, then ignorance is better than such knowledge.”

“To explain all nature is too difficult a task for any one man or even for any one age. Tis much better to do a little with certainty & leave the rest for others that come after than to explain all things by conjecture without making sure of any thing.”