Reason, observation, and experience; the holy trinity of science.
Source: The Works of Robert G. Ingersoll
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235 quotes in this category.
Reason, observation, and experience; the holy trinity of science.
Great wits are sure to madness near allied.
Many receive advice; few profit from it.
The thinker serves it by his intellect, and as a light upon its path.
I keep up talk with myself about politics, love, taste, or philosophy;
What God hath made, into that let man inquire.
The reading, not of all books, but especially of such as have been written by persons capable of conveying proper instruction, for it is a species of conversation we hold with their authors.
It does not suffice that the understanding be good - it must be well applied.
The first degree contains only notions so clear of themselves that they can be acquired without meditation.
This sort of men fancied that philosophy was to be studied like the Aeneid or Odyssey, and that the true reading of nature was to be detected by the collation of texts.
Man is a growth by law, and not a creation by artifice, and cause and effect is as absolute and undeviating in the hidden realm of thought as in the world of visible and material things.
So few people who can write know anything.
The reason why so few good books are written is that so few people that can write know anything.
The mind of man is capable of anything—because everything is in it, all the past as well as all the future.
Philosophers have explained space. They have not explained time.
And when I say "the human machine" I mean the brain and the body—and chiefly the brain.