"Starting from this conviction, I determined to find a sense and a meaning in life, and I cannot help saying that my efforts have been crowned with some success. Mistrusting even as a school-boy the results to be obtained from mere speculation, I chose a science which reveals the processes of our soul, as it were, _ad oculos_--Medicine. I chose it, moreover, because in its practice it brings us advantageously into intimate contact with other men, from whom we hold but too generally aloof--whatever may be said in praise of solitude. He who has once understood the solidarity of all human interests--that fundamental principle of all moral and political wisdom--knows also that his individual existence is but a drop in the vast stream, and that such a drop has no right to claim absolute independence. It would be different if men fell like ripe fruit from the trees. But we are brought into this world through the agony of a mother, in order to be the most helpless of all created beings, entirely dependent on the faithful care of parents; we are then allowed to grow up, if fate favors us, amid brothers and sisters, in order not only to share with them all the joys of life, but also to obtain them by their assistance; and, even later, we cannot enjoy any true pleasure, any delight of our heart, except through others and with others. All this teaches us that we are true children of men, the offspring of this earth, with the right and the duty to work out our life here below upon our inheritance side by side with other children of men, our brethren, who have the same rights, and of course also the same duties, as we ourselves.