Love is that condition in which the happiness of another person is essential to your own.
Robert A. HeinleinA slave cannot be freed, save he do it himself. Nor can you enslave a free man; the very most you can do is kill him!
Robert A. HeinleinFrom somewhere, back in my youth, heard Prof say, 'Manuel, when faced with a problem you do not understand, do any part of it you do understand, then look at it again.' He had been teaching me something he himself did not understand very wellโsomething in mathโbut had taught me something far more important, a basic principle.
Robert A. Heinlein