The text presents the view of the Polish physicist Grzegorz Białkowski on using aesthetic criteria in the practice of science, first of all in the practice of physics. Białobrzeski claims—along with Henri Poincaré, Werner Heisenberg and Paul Dirac— that aesthetic criteria are present in the creating and assessing of scientific theories; he also searches for a justification of referring to these criteria. He also draws attention to the role of aesthetic experience in scientific activity. He justifies the presence of aesthetic criteria in physics as part of his naturalistic attitude.