In the final line of Chapter 11, Tea Cake tells Janie how much he wants to be with her and expresses his depth of emotion with the words, "You got de keys to de kingdom." This last sentence is a Biblical allusion.
As stated in a previous post, this phrase is used in the Book of Matthew in the New Testament of the Bible. There Christ tells Peter he will give the apostle the keys to the reign of heaven. So for Tea Cake, Janie is all that he could ever desire; she is the ultimate goal of his life. With her love his life will be fulfilled because he will feel as though he is in heaven.
With these words of deep spiritual meaning, Tea Cake engages both Janie's heart and her spirit in equal measure. Janie finds in this man what she has long sought, as he has in her--the opportunity to truly love someone as an equal, and the chance to enjoy life without being a man's mule as with Logan or his simple adornment as with Joe. Together Tea Cake and Janie find happiness, fulfillment as individuals, and the true meaning of what it is like to coexist in love.