God himself is the reason
Your steadfast love, O Lord, endures forever.
Do not forsake the work of your hands. Psalm 138:8
Read Deuteronomy 7:6—11
I have this in common with the Israel of God: I am called from among the peoples and there is no reason I can give beyond God himself. It’s not because I am excessively talented, though every talent I have is now rightly the Lord’s. It is not because I have a brilliant and winning personality, though some Christlike traits may be spotted by the discerning from time to time, since I make time to commune with Christ. It is not that I am a person of vast wealth, though what I have is no longer my own, and some of it, at least, I consciously direct in his name. But no reason outside God’s own great, choosing, warm and generous grace can be given. I cannot truly explain who I am apart from him.
Gracious, loving Father, you have chosen yourself to be my God. You have chosen your Son to be my Saviour and my Lord and my brother. You have chosen your Spirit to awaken me to who you are and to attune me to your purpose. I have not chosen you. You have chosen me. Yet it is my benefit. It is my blessing. It is, I declare, what I am made for. It is your will I can see as my own best good.