And "believing" is the GIFT of God:
Eph. 2:8 For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,
Phil. 1:29 For it has been granted to you that for the sake of Christ you should not only believe in him but also suffer for his sake,
Rom. 12:3 For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, each according to the measure of faith that God has assigned.
2Pet. 1:1 Simeon Peter, a servant and apostle of Jesus Christ, To those who have obtained a faith of equal standing with ours by the righteousness of our God and Savior Jesus Christ: