What you feed in yourself that grows.

Was Du in Dir nährst, das wächst.

Each one's no longer consciousOf the high wall, or the rest:Since the one enduring fortress,Is the soldier's iron breast.If you’d live unconquered,Quickly arm, and fight the real foe:Every wife an Amazon bred,And every child a hero.

You only keep a watch on those who cause you suffering. If you want to remain unknown to the world, all that's needed is not to hurt anyone.

Everything in science depends on what one calls an aperçu, on becoming aware of what is at the bottom of the phenomena. Such becoming aware is infinitely fertile.