Faith in God is not suggested, recommended, or optional!

God commands us to exercise and live by faith:

1. Believe in God believe also in Me (Jesus Christ) - John 14:1. 
2. Have faith in God - Mark 11:12.
3. Be not faithless but believing - John 20:27. 
4. Fight the good fight of faith - 1 Timothy 6:12. 
5. Live by faith not by sight - 2 Corinthians 5:7.    
6. The just will live by faith (3 times in NT). The life of faith is the only “Lifestyle!” - Romans 1:17.
7. The life which I now live in the flesh I live by the faith of the Son of God - Galatians 2:20.
8. Without faith you cannot please God; for whoever comes to God must believe that He is and that He is a rewarder of those who diligently seek Him - Hebrews 11:6.