Reason is our guide, but the eye is its most trusted counselor. - Dmitri Bilenkin

What is the aim of science?
"What?"
"Man's happiness. If science doesn't make men happier, what good is it? Knowledge is power, a weapon, and if the scientist doesn't care where it's aimed, what makes him different from a mercenary soldier?"

“In traveling to the past, you can either appear in a predetermined point in space or in a predetermined point in time. In principle, it is impossible to do both simultaneously.” (Fundamental Temporalics, A.D. 2023)

He’s not a nut. His presence, it seems, really does stimulate the creative capabilities. All right. So what? For millions of people, that’s what you would call a profession. Teachers do not produce anything of material or intellectual value themselves. They transmit knowledge, and most important, stimulate the mental and moral growth of children—real teachers, of course. That is the great meaning of their profession, to disseminate their thoughts and actions in such a way that they interweave like a golden thread in someone else’s life and then come alive unrecognized in the discoveries and achievements of the future—a profession of utmost importance for society.