Fyodor Dostoevsky. The Brothers Karamazov (№ 455817)

A sacrifice of life is, perhaps, the easiest of all sacrifices in many such cases, and what to sacrifice, for example, five or six years of your exuberant youth of life for difficult, difficult learning, for science, if only in order to multiply your strength tenfold to serve the same truth and the same feat, which he loved and which he proposed to make - such a sacrifice is very often for many of them almost completely beyond their strength.