Child psychology and animal psychology are of relatively slight importance, as compared with the sciences which deal with the corresponding physiological problems of ontogeny and phylogeny.
The Christ-symbol is of the greatest importance for psychology in so far as it is perhaps the most highly developed and differentiated symbol of the self, apart from the figure of the Buddha.
A work of art has no importance whatever to society. It is only important to the individual.
Idleness is the parent of psychology.