The hardest conviction to get into the mind of a beginner is that the education upon which he is engaged is not a college course, not a medical course, but a life course, for which the work of a few years under teachers is but a preparation.

He who knows syphilis knows medicine

A library represents the mind of its collector, fancies and foibles, strengths and weaknesses, prejudices and preferences.

Be calm and strong and patient. Meet failure and disappointment with courage. Rise superior to the trials of life, and never give in to hopelessness or despair. In danger, in adversity, cling to your principles and ideals. Aequanimitas!

The future belongs to Science. More and more she will control the destinies of the nations. Already she has them in her crucible and on her balances.

The philosophies of one age have become the absurdities of the next, and the foolishness of yesterday has become the wisdom of tomorrow.

To know just what has do be done, then to do it, comprises the whole philosophy of practical life.