Experiment is the sole interpreter of the artifices of Nature.
A diamond is just a lump of coal that stuck to its job.
Those who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery.
He who thinks little errs much.
Thou, O God, dost sell us all good things at the price of labor.
To speak ill of a good person is not truly good, all in all.