Paul clearly states in Romans 10:8 that we have a debt of love to repay to those God brings into our lives whether they be family, friends, acquaintances or strangers. This debt was incurred because of the great love shown to us by our Heavenly Father as He gave His only begotten Son to die for our sins. While the acknowledgement of this love debt is somewhat of a foregone conclusion the method of repayment is a great challenge.
The apostle reaches back into the Old Testament law to illustrate how we can demonstrate God's love and thereby repay the debt. Love is demonstrated as we care for our neighbors and keep the Law. God's love flows from a surrendered heart (Rom 12:1) and it take God's grace to love others as we naturally love ourselves (Phil 2:3,4).
"If we love God with all our heart and other people with all our heart, we can do as we please, because we will only want to do that which pleases God and benefits others." (unknown)