What is faith? A Modern dictionary simply defines faith as belief and trust in and loyalty to God.
If you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. --Romans 10:9
I am not ashamed of the gospel, because it is the power of God for the salvation of everyone who believes. --Romans 1:16
The righteous will live by faith. -- Romans 1:17