Just as God does not lower His bar, we as parents should not lower our bar when our children fail to meet our standards. Rather, we should provide them with every means available to encourage them to meet those standards instead.
Once the standard (i.e. rules) is clearly explained and the child is aware of the parent’s expectations, then this might entail nothing more than a gentle verbal/visual reminder of standards, removing contradicting messages/influences (either from media, friends or activities), or using negative/positive reinforcements (as appropriate) to encourage right behavior/attitudes and discourage those that are wrong/sinful.
After all, this is certainly the way that God worked with His people throughout human history. After the Law was clearly given through Moses, He sent prophets to serve as visible/audible reminders. At other times, He completely removed their system of false religion (and the various surrounding nations that encouraged it) which His people had begun to pursue, which contradicted His Law. Also, He showered them with blessings when they obeyed His Law and brought curses upon them when they chose to disobey all as an external means of encouraging behavior/attitudes that were in accordance with His Law and discouraging those that opposed it.