- "The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.” ---Jules Henri Poincaré
- "There are many examples of old, incorrect theories that stubbornly persisted, sustained only by the prestige of foolish but well-connected scientists. ... Many of these theories have been killed off only when some decisive experiment exposed their incorrectness...Thus the yeoman work in any science, and especially physics, is done by the experimentalist, who must keep the theoreticians honest." ----Michio Kaku