Answer: Faith in Jesus Christ is acknowledging the truth of everything that God has revealed in his Word, trusting in him, and also receiving and resting on him alone for salvation as he is offered to us in the gospel.
Scripture: Galatians 2:20 I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me.
Source: New City Catechism