"It is indeed a pity that the results of the experiments cannot yet be published, as I have not yet succeeded in obtaining the desired number of generations."

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

"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."

"Nature loves simplicity and unity."

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