The secret of thriving is thrift; saving of force; to get as much work as possible done with the least expenditure of power, the least jar and obstruction, the least wear and tear. And the secret of thrift is knowledge. In proportion as you know the laws and nature of a subject, you will be able to work at it easily, surely, rapidly, successfully, instead of wasting your money or your energies in mistaken schemes, irregular efforts, which end in disappointment and exhaustion.

Lecture on Thrift. 1869.