Man has no moral instinct. He is not born with moral sense. You were not born with it, I was not - and a puppy has none. We acquire moral sense, when we do, through training, experience, and hard sweat of the mind.
Robert A. HeinleinI took up writing because I needed money. And I continued to write because it's safer than stealing and easier than working.
Robert A. HeinleinWe each have a moral obligation to conserve and preserve beauty in this world; there is none to waste.
Robert A. HeinleinI believe that this hairless embryo with the aching, oversize brain case and the opposable thumb, this animal barely up from the apes, will endure --will endure longer than his home planet, will spread out to the other planets, to the stars, and beyond, carrying with him his honesty, his insatiable curiosity, his unlimited courage --and his noble essential decency. This I believe with all my heart.
Robert A. Heinlein