The fifth commandment says - "Honour that father and thy mother." Among all relations and love, parents' love is the most unselfish. You can never repay what they have done for you. Do not hurt parents by your words or deeds, do not bring tears in their eyes. GOD forbid, you will invoke and invite GOD's judgement, terrible punishment and curse. Bible says-GOD is love but the same Bible says- our GOD is a fearsome GOD, a consuming fire. We have to face the consequences of our choices.