Vulnerable, like all men, to the temptations of arrogance, of which intellectual pride is the worst, he [the scientist] must nevertheless remain sincere and modest, if only because his studies constantly bring home to him that, compared with the gigantic aims of science, his own contribution, no matter how important, is only a drop in the ocean of truth.
Entering a cell, penetrating deep as a flying saucer to find a new galaxy would be an honorable task for a new scientist interested more in the inner state of the soul than in outer space.
Be brave. Be free from philosophies, prophets and holy lies. Go deep into your feelings and explore the mystery of your body, mind and soul. You will find the truth.
During the first half of the present century we had an Alexander von Humboldt, who was able to scan the scientific knowledge of his time in its details, and to bring it within one vast generalization. At the present juncture, it is obviously very doubtful whether this task could be accomplished in a similar way, even by a mind with gifts so peculiarly suited for the purpose as Humboldt's was, and if all his time and work were devoted to the purpose.
Think of facts and figures as bricks and cement, and science or scientific understanding as a building. Without the vision of the architect, it's impossible to construct the building no matter how much bricks and cement you have.