You can hardly convince a man of an error in a lifetime, but must content yourself with the reflection that the progress of science is slow. If he is not convinced, his grandchildren may be.
Henry David ThoreauWhat an admirable training is science for the more active warfare of life! Indeed, the unchallenged bravery which these studies imply, is far more impressive than the trumpeted valor of the warrior.
Henry David ThoreauHow prompt we are to satisfy the hunger and thirst of our bodies; how slow to satisfy the hunger and thirst of our souls!
Henry David Thoreau