LOVE vs DISCIPLINE and COMMITMENT. Love has a central pivotal most vital "central midfielder" role to play in fidelity/being faithful in relationships and marriage. Self-discipline and commitment are quite important; nevertheless, they play only a supportive role - like a "supporting striker" assisting the main striker! See: discipline, commitment, etc can fail(under pressure, duress, etc); but love - genuine true love - cannot fail. Discipline and commitment, and the other ingredients that support love in a relationship can and do fail when love is NOT present - like Barca without their dear Messi! But, love without the other supporting ingredients of a relationship may be quite much stressed and strained, maimed and weakened; but can NEVER FAIL! This is why it's very RISKY to marry someone for whom you don't feel much emotions. #GenuineMutualLoveCan'tCheat!