How To Prove You Don't Have Brains

This Spurgeon quote courtesy of Justin Buzzard:

"The man who never reads will never be read; he who never quotes will never be quoted. He who will not use the thoughts of other men's brains, proves that he has no brains of his own."

-Charles Spurgeon, Sermon: Paul, His Cloak And His Books

These words affirm my frequent quotations of men like John Piper, Jonathan Edwards, Spurgeon, R.C. Sproul, and the like. But can a preacher quote others too much? Hmmm...