Knowledge ... shall always bear witness like a clarion to its creator.
When you put your hand in a flowing stream, you touch the last that has gone before and the first of what is still to come.
Beyond a doubt truth bears the same relation to falsehood as light to darkness.
Experiment is the sole interpreter of the artifices of Nature.
Nature varies the seed according to the variety of the things she desires to produce in the world.
The natural desire of good men is knowledge.