„We should still expect to discover many unknown simple bodies; for example, those similar to aluminum and silicon, elements with atomic weights of 65 to 75.“

— Dmitri Mendeleev
„The really clever thing, in affairs of this sort, is not to win a woman already desired by everyone, but to discover such a prize while she is still unknown.“
— Cesare Pavese
„Human reason has discovered many amazing things in nature and will discover still more, and will thereby increase its power over nature.“
— Vladimir Lenin