"The Creator has arranged the world in such a way that nothing is left to chance."

"Whether they will retain the characteristics of the hybrid, or whether they will show variations, will be determined by next year's observations."

"It requires indeed some courage to undertake a labor of such far-reaching extent."

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

"I am convinced that it will not be long before the whole world acknowledges the results of my work."