“All cells come from cells. Every cell is born of a previous cell, which was born of a previous cell. Life comes from life. Life begets life begets life begets life.”

“Omnis cellula e cellula," he said again. "All cells come from cells. Every cell is born of a previous cell, which was born of a previous cell. Life comes from life. Life begets life begets life begets life begets life.”

“Every hidden cell is throbbing with music and life, every fiber thrilling like harp strings.”

“The tragedy is that every brain cell devoted to belief in the supernatural is a brain cell one cannot use to make life richer or easier or happier.”

“Wait, wait. I don't get it.''That is because you only have eight functioning brain cells.”

“Life is a solitary cell whose walls are mirrors.”

“It is not a simple life to be a single cell, although I have no right to say so, having been a single cell so long ago myself that I have no memory at all of that stage in my life.”