Ambition has its disappointments to sour us, but never the good fortune to satisfy us. Its appetite grows keener by indulgence and all we can gratify it with at present serves but the more to inflame its insatiable desires.

That as we enjoy great advantages from the inventions of others, we should be glad of an opportunity to serve others by any invention of ours, and this we should do freely and generously.

The key that unlocks a door is a key to keep if you want to go through that door again.

Neglect kills injuries, revenge increases them.

He that lives upon hope will die fasting.

Let thy discontents be thy secrets; if the world knows them 'twill despise thee and increase them.

Most people die at 25 but are buried at 75.