These are from the 9th Century Sufi wise man Abu Yazid Al-Bistami and come from the "Anthology of Sacred Prose" THE ENLIGHTENED MIND edited by Stephen Mitchell, a favorite book of mine for many years. The Al-Bistami translations are by Reynold A. Nicholson:
"Nothing is better for a man than to be without anything, having no asceticism, no theory, no practice. When he is without everything, he is with everything."
"Anyone whose reward from God is deferred until tomorrow has not truly worshiped Him today."
"A single atom of the sweetness of wisdom in a man's heart is better than a thousand pavilions in Paradise."
and my favorite:
"For thirty years I used to say, "Do this" and "Give that"; but when I reached the first stage of wisdom, I said, "O God, be mine and do whatever You want."