“In the hydraulic and optical part, may be enumerated an over flowing lamp; a simplification of the rules for finding the velocity of running water; remarks on the application of force to hydraulic machines; a mode of letting out air from water pipes; an analysis of the human voice; and some arrangements for solar microscopes, and for other optical instruments of a similar nature.”

“Life is flowing away like water running out from a leaky vessel.”

“Our separation from each other is an optical illusion.”

“It is a fantastic letter. Very understated. He calls it an optical maser, it’s as if a maser was made to run in the optical. No flamboyant phrase, just straightforward science.”

“My flow is in the pocket like Wallace
I got the bounce like hydraulics
I can't call it
I got the swerve like alcoholics”

“Ethics could teach us only those purposes and ideals. If the teachers seeks insight into the means by which the aim can be reached, into the facts by which the child can be molded, his way must lead from ethics to psychology. (…) Water flows downhill, anyhow, but to bring the water uphill hydraulic forces are indeed necessary. To overcome nature and instead to prepare for a life of ideals, to inhibit personal desires and instead to learn to serve the higher purposes indeed demands most serious and most systematic efforts. It is the teachers' task to make these efforts with all his best knowledge of mind and body, of social and of cultural values.”

“Biases are either “hot” (that is, produced by the agent’s motivational system) or “cold” (more similar to optical illusions).”

“He left in his Optics, the earliest surviving table of angles of refraction from air to water. …This table, quoted and requoted until modern times, has been admired… A closer glance at it, however, suggests that there was less experimentation involved in it than originally was thought, for the values of the angles of refraction form an arithmetic progression of second order… As in other portions of Greek Science, confidence in mathematics was here greater than that in the evidence of the senses, although the value corresponding to 60° agrees remarkably well with experience.”

“Just like water and air, connection with others is a basic human need.”

“Grace, like water, flows to the lowest part.”