“Observation is a passive science, experimentation an active science.”

“It is what we know already that often prevents us from learning.”

“Observation is a passive science, experimentation an active science.”

“Experimentation is an active science.”

“Art is I science is we. ”

“Art is I science is we.”

“Art is I science is we.”

“Science increases our power in proportion as it lowers our pride.”

“Science increases our understanding in proportion as it lowers our pride.”

“It's what we think we know that keeps us from learning.”