Homo Unius Libri

I came across this quote from John Wesley's Sermons on Several Occasions the other day.  It's a good reminder of our purpose:

I have thought, I am a creature of a day, passing through life as an arrow through the air. I am a spirit come from God, and returning to God: Just hovering over the great gulf; till, a few moments hence, I am no more seen; I drop into an unchangeable eternity! I want to know one thing, — the way to heaven; how to land safe on that happy shore. God himself has condescended to teach the way: For this very end he came from heaven. He hath written it down in a book. O give me that book! At any price, give me the book of God! I have it: Here is knowledge enough for me. Let me be homo unius libri. [A man of one book.] Here then I am, far from the busy ways of men. I sit down alone: Only God is here. In his presence I open, I read his book; for this end, to find the way to heaven.