Augustus Toplady wrote the hymn “Rock of Ages” which contains this verse

Nothing in my hands I bring,
Simply to Thy cross I cling;
Naked, come to Thee for dress,
Helpless, look to Thee for grace:
Foul, I to the fountain fly,
Wash me, Savior, or I die.

Christ teaches us experientially that everything we have must be relinquished and counted as loss for the excellency of the knowledge of Christ.  Gerard Wijsse, a Reformed pastor in the 19th-century wrote,

Christ the Prophet teaches us in the realm of redemption that our righteousnesses are as filthy rags; that is, as far as our attempts to render ourselves worthy of grace with them.  He lets us see that we have nothing, but also that we need not have anything in order to be objects of free grace.  In Christ there is an all-sufficiency; when compared to this one sacrifice, none of our sacrifices have any value – neither are they necessary.

The phrase “need not have anything…” is so striking! How absorbed we are in the merits of the [broken] covenant of works and how glorious is the freeness of God’s gracious covenant provisions in Christ alone!