"Man must contribute his minimum work of toil, and God gives the growth. Truly, the seed, the talent, the grace of God is there, and man has simply to work, take the seeds to bring them to the bankers."

"I have seen the future of biology, and it is in the numbers."

"The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used."

"It requires a good deal of courage to undertake such extensive experiments."

"I measure, I count, I compare—this is the way of science."