A mind that is stretched by a new experience can never go back to its old dimensions.
There are many things which we can afford to forget which it is yet well to learn.
We should be eternally vigilant against attempts to check the expression of opinions that we loathe.
Go on, fair Science; soon to thee Shall Nature yield her idle boast; Her vulgar lingers formed a tree, But thou hast trained it to a post.
Science is the topography of ignorance. From a few elevated points we triangulate vast spaces, inclosing infinite unknown details. We cast the lead, and draw up a little sand from abysses we may never reach with our dredges.
As for the excellent little wretches who grow up in what they are taught, with never a scruple or a query, ... they signify nothing in the intellectual life of the race.
[The Constitution] is an experiment as all life is an experiment.
Knowledge-it excites prejudices to call it science-is advancing as irresistibly, as majestically, as remorselessly as the ocean moves in upon the shore.
Science ... in other words, knowledge-is not the enemy of religion; for, if so, then religion would mean ignorance. But it is often the antagonist of school-divinity.
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