The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
Never let your sense of morals prevent you from doing what's right.
Creationists make it sound as though a 'theory' is something you dreamt up after being drunk all night.
A robot may not injure humanity or through inaction allow humanity to come to harm. [The Zeroth Law of Robotics]
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Educate your children to self-control, to the habit of holding passion and prejudice and evil tendencies subject to an upright and reasoning will, and you have done much to abolish misery from their future and crimes from society.
The greatest loss of time is delay and expectation, which depend upon the future. We let go the present, which we have in our power, and look forward to that which depends upon chance, and so relinquish a certainty for an uncertainty.