Never think that God's delays are God's denials. Hold on; hold fast; hold out. Patience is genius.
Writing well is at one and the same time good thinking, good feeling, and good expression; it is having wit, soul, and taste, all together
Genius is only a greater aptitude for patience.
The human mind cannot create anything. It produces nothing until after having been fertilized by experience and meditation; its acquisitions are the gems of its production.
The discoveries that one can make with the microscope amount to very little, for one sees with the mind's eye and without the microscope the real existence of all these little beings.