To be proud of knowledge is to be blind with light.
What maintains one vice would bring up two children.
Take a coin from your purse and invest it in your mind. It will come pouring out of your mind and overflow your purse.
An ounce of prevention is worth a pound of cure.
No gains without pains.
Nor is it of much Importance to us to know the Manner in which Nature executes her laws; 'tis enough to know the Laws themselves.