It is the only way to please God. Faith works through love. Faith is required for prayer. But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
Faith is a walk.
We are to walk by faith opposed to walking by sight. When we walk in faith, we are walking in the Spirit. When we walk in faith, we are walking in resurrection power. When we are walk in faith, we are free from sin. When we walk in faith, we fulfill our calling.