Here is a spiritual principle: We cannot exercise love unless we are experiencing grace. You cannot truly love others unless you are convinced that God's love for you is unconditional, based solely on the merit of Christ, not on your performance. Our love, either to God or to others, can only be a response to His love for us.
Love provides the motive for obeying the commands of the law, but the law provides specific direction for exercising love.
Sometimes the end God has in mind is to exercise our faith, so He brings us into straitened circumstances so that we might look up to Him and see His deliverance.