We should never be more lenient than God. We must follow His example in both fairness and justice. God’s wisdom is infinite so even when we don’t understand His reasoning we need to obey His commands. Disobedience will be punished.
We must never become too busy to take care of the sacred responsibilities God has given us. But we must not feel guilty if our circumstances do not allow us to be involved in as many church works as we would like.