Great Throughts Treasury

"Two principles govern the moral and intellectual world. One is perpetual progress, the other the necessary limitations to that progress. If the former alone prevailed, there would be nothing steadfast and durable on earth, and the whole of social life would be the sport of winds and waves. If the alter had exclusive sway, or even if it obtained a mischievous preponderancy, every thing would petrify or rot. The best ages of the world are those in which these two principles are the most equally balanced. In such ages every enlightened man ought to adopt both principles, and with one hand develop what he can, with the other restrain and uphold what he ought."

"Every enlightened man ought... with one hand develop what he can, with the other... uphold what he ought."