The author discusses the part of philosophy called aesthetics and points out the difference between factual science and the philosophy of essence. He finds that the philosophy of essence is of no use in helping artists or other creative individuals to find really valuable paths to follow among the vast number of theoretically possible paths. He finds that such guidance can be found only through a better understanding of relevant facts by resorting to controlled experiments. The difficulties of applying the principal method of science to experimental aesthetics are reviewed and some of the positive achievements of this new science are mentioned. He finds that it is the right and duty of those working in experimental aesthetics to take advantage of the knowledge accumulated by experimental psychologists in collaboration with physiologists, biologists and mathematicians. He ends with the hope that the science of art will become a part of the science of human behavior.