"The religion of the Old Testament is obviously as fundamentally a religion of faith as is that of the New Testament. - ...the religion of Israel was a religion of faith...not merely because faith was more consciously its foundation, but because its very essence consisted in faith, and this faith was the same radical self-commitment to God, not merely as the highest good of the holy soul, but as the gracious Savior of the sinner, which meets us as the characteristic feature of the religion of the New Testament. The entire patriarchal narrative is set forth with the design and effect of exhibiting the life of the servants of God as a life of faith.... - ...faith was for them (the patriarchs) the precondition of all obedience. The patriarchal religion is ....characteristically described as a walk 'with God'; its peculiarity consisted precisely in the ordering of life by entire trust in God, and it expressed itself in conduct growing out of this trust, Gen. 3:20; 4:1; 6:22; 7:5; 8:18; 12:4; 17:23; 21:12, 16. The righteousness of the patriarchal age was thus but the manifestation in life of an entire self-commitment to God, in unwavering trust in His promises." - Warfield, pg. 406f.