"Do the day's work..."

Given my line of work, I generally don’t like advice from the other branches of government, but this address of a former President to Congress was particularly excellent in my opinion. Any guesses (without googling) who said it?

“Men do not make laws. They do but discover them. Laws must be justified by something more than the will of the majority. The must rest on the eternal foundation of righteousness. That state is most fortunate in its form of government which has the aptest instruments for the discovery of laws.
“The people cannot look to legislation generally for success. Industry, thrift, character, are not conferred by act or resolve. Government cannot relieve from toil. It can provide no substitute for the rewards of service. It can, of course, care for the defective and recognize distinguished merit. The normal must care for themselves. Self-government means self-support.
“Man is born into the universe with a personality that is his own. He has a right that is founded upon the constitution of the universe to have a property that is his own. Ultimately, property rights and personal rights are the same thing. The one cannot be preserved if the other is violated. Each man is entitled to his rights and the rewards of his service be they never so large or never so small.
“Do the day’s work. If it be to protect the rights of the weak, whoever objects, do it. If it be to help a powerful corporation better to service the people, whatever the opposition, do that. Expect to be called a stand-patter, but don’t be a stand-patter. Expect to be called a demagogue, but don’t be a demagogue. Don’t hesitate to be as revolutionary as science. To hesitate to be as reactionary as the multiplication table. Don’t expect to build up the weak by pulling down the strong. Don’t hurry to legislate.”