"My son, all my life I have loved this science so deeply that I can now hear my heart beat for joy. Commenting about Pasteur's accomplishment of separating two asymmetric forms of tartaric acid crystals."

Previous Quote

An undertaking of great magnitude and importance, the successful accomplishment of which, in so comparatively short a period, notwithstanding the unheard of unestimable difficulties and impediments which had to be encountered and surmounted, in an almost unexplored and uninhabited wilderness . . . evinced on your part a moral courage and an undaunted spirit and combination of science and management equally exciting our admiration and deserving our praise.

— John By