For the Christian, failure to keep a vow or promise or covenant or contract is not merely a moral or ethical issue but a Gospel issue. This notion is on the mind of the apostle Paul when he pivots upon Galatians 3:15 to demonstrate that believers can rest their full weight on the Gospel because it stands upon the promises God made to Abraham — promises that can never be set aside or amended.
To give a human example, brothers: even with a man-made covenant, no one annuls it or adds to it once it has been ratified. (Galatians 3:15 ESV)
We live in a culture that rests upon many Biblical values, so even non-Christians expect people to keep their agreements.… Read the rest