If you think that the combination of chemicals can produce living force, then why don't you do it in the laboratory? The chemicals are there. You can combine and just produce a small ant, moving. Then it is... Science means observation and experiment. So if you simply observe, and cannot make any experiment, practical, so then that is not science. That is only theory. That is not possible. No scientist has ever made any living entity by combination of chemicals in the laboratory. Nobody can do that.
Lecture on Bhagavad-gita 2.26, Hyderabad, 29 November, 1972