Only life can beget life.

The renowned scientist Louis Pasteur demonstrated that truth in his day. He held up a thoroughly sterilized and hermetically sealed flask before his audience. “It is devoid of life!” he exclaimed. “I can keep it for a hundred years, and it will still be devoid of life. I can beg and plead with it to produce a life-form, even the humblest life form, but it remains unmoved by my pleas. There is no life without antecedent life. Only life can beget life.”