You could leave life right now. Let that determine what you do and say and think. Book II
It would have been so pointless to kill himself that, even if he had wanted to, the pointlessness would have made him unable. The Trial
Look within. Within is the fountain of the good, and it will ever bubble up, if thou wilt ever dig. Book VII
I think that the philosopher must, for his own purposes, carry methodological strictness to an extreme when he is investigating and pursuing his truths, but when he is ready to enunciate them and give them out, he ought to avoid the cynical skill with which some scientists, like a Hercules at the fair, amuse themselves by displaying to the public the biceps of their technique. History as a System
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