In plain words
Whatever I say, it is not for Me. Whatever I do, it is not for Me. I need nothing. But one thing alone I want. Prema alone I want. Prema is not your property. That is also My property. If there is Prema in anyone, it is God's gift. It is not something you earned. So lift this gift. Then what suits you will come to you. What was gifted to you, gift that back to God Himself. That alone is your chief service. This is what they said.
The heart You gave me, O Lord, that very heart I offer back to You, O great One; what else could I bring to Your worship? With folded hands I offer it: accept it, Lord.
I am giving You only what You gave. It is not mine. This is just what You gave. The one whose heart melts with that feeling, he is the true devotee. The one in whose heart that feeling rises, he is the true man of sacrifice. So such feelings must rise in your hearts. If, without thinking so, you go on describing only your own Bhakti, saying 'my Bhakti', it takes the form of Ahaṅkāra. You must give no room to Ahaṅkāra. Rāmadāsu too said it. Great hardships came to him. Hardships came to Tyāgarāja. Great hardships keep pursuing great devotees. Why do these hardships come? Only to keep your heart safe. Only to make your heart pure. Only for the sake of removing your hardships. If we are to scour a vessel, we must work very hard, must we not! In the same way a great deal of dirt has gathered in the vessel of your heart. Hardships keep coming in order to make it clean. This Rāmadāsu, Tukārām and Tyāgarāja too suffered hardship.
Suffering in prison, Rāmadāsu grew angry with Rāma. He grew angry with God too. What, are You really powerful? If You really have power, why can You not remove my hardship? You have no power. I have Bhakti. As he praised himself, his Ahaṅkāra swelled.