Theodore Roosevelt actually said...

Each of us, unless he is contented to be a cumberer of the earth's surface, must strive to do his life-work with his whole heart.

Hardness of heart is a dreadful quality, but it is doubtful whether, in the long run, it works more damage than softness of head.

The only way by which, in the long run, any man can be helped is by teaching him to help himself.

The man who lives simply, and justly, and honor ably, whether rich or poor, is a good citizen.