Galatians 5:1 "So Christ has truly set us free. Now make sure that you stay free, and don’t get tied up again in slavery to the law."
The grace is therefore available because love is not just a feeling and so there are some people that seem to make our love walk to be so difficult because they appear to be so "unlovable", but that is why there is grace. Grace enables! It gives us power to do that which we can not ordinarily do ourselves. It is not human/fleshy to Love all as God as commanded, but God doesn't give us a requirement without equipping us to be able to fulfill, so he gives us GRACE.
In total, we have to be alert as to not "get tied up again in slavery", for Christ has set us free from the law, that our freedom may be used to glorify his name and not our flesh (verse 13: "For you have been called to live in freedom, my brothers and sisters. But don’t use your freedom to satisfy your sinful nature. Instead, use your freedom to serve one another in love.") and the way this is done in this earthly world is through LOVE, this is one language that the human race will understand whether saved or unsaved.
Preserve your Saltiness