Boris Pasternak. Doctor Zhivago (№ 337426)

But no matter how great was his thirst for art and history, the Jura was not constrained by the choice of the field. He believed that art is not fit to vocation in the same sense as there can be a profession innate gaiety or an inclination to melancholy. He was interested in physics, science and in practical life it is necessary to do something usefull. So he went on medicine.