The joys of parents are secret, and so are their grieves and fears.

The human understanding, when any preposition has been once laid down... forces everything else to add fresh support and confirmation; and although more cogent and abundant instances may exist to the contrary, yet it either does not observe them or it despises them, or it gets rid of and rejects them by some distinction, with violent and injurious prejudice, rather than sacrifice the authority of its first conclusions.

In revenge a man is but even with his enemy; for it is a princely thing to pardon, and Solomon saith it is the glory of a man to pass over a transgression.

Atheism leads a man to sense, to philosophy, to natural piety, to laws, to reputation: all of which may be guides to an outward moral virtue.

Such philosophy as shall not vanish in the fume of subtile, sublime, or delectable speculation but shall be operative to the endowment and betterment of man's life.

If any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to attain, in fact, clear and demonstrative knowlegde instead of attractive and probable theory; we invite him as a true son of Science to join our ranks.

He of whom many are afraid ought himself to fear many.