Before Jesus ascended to heaven, He told His disciples and us that He would send us a Comforter and that Comforter would teach us everything.
25 I am telling you these things now while I am still with you. 26 But when the Father sends the Advocate as my representative—that is, the Holy Spirit—he will teach you everything and will remind you of everything I have told you.—John 14:25,26 (NLT)
The Holy Spirit abides in us and His job is to teach us everything, including how to love God and how to love others. The English language does not have words for different kinds of love. In the Greek, there are at least 6 words for love, Let’s look at four of those. We have philos or phileo (brotherly, friendly love), storge (natural or love for family) eros (sexual) love. These three can be accomplished to a degree in the natural and involve both parties loving and giving. The fourth word is agape (unconditional) love. This is the love that comes only from God, It is the love that only the Spirit can teach us. It is unilateral love, God loves us whether we return that love or not. The flesh can not love in that respect. This is the love that we are to be striving to show to others. But, as Paul said, we “must strive toward the mark”. We must keep practicing loving without expecting anything in return.