If you always put limit on everything you do, physical or anything else, it will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you must go beyond them.

If you want to do your duty properly, you should do just a little more than that.

Everything that is really great and inspiring is created by the individual who can labor in freedom.

It is important to understand that even in theory the payment of the worker is not determined by the value of his product.

With a good conscience our only sure reward, with history the final judge of our deeds, let us go forth to lead the land we love, asking His blessing and His help, but knowing that here on earth God's work must truly be our own. Inaugural Address (20 January 1961)

I've always believed that if you put in the work, the results will come. I don't do things half-heartedly. Because I know if I do, then I can expect half-hearted results.