First we have to define true love.loving in-order to get something is not love at all.love for the sake of love.there is no trading in love.
God is love itself.He is omnipresent.Suppose that one person is so religious and he had visions of God or saw God and he began to love God.Hindu belief is that the ultimate aim is to become one with God.So this person loved God and eventually he begins to posses psychic powers.That's he got some powers of God or the Godliness is manifesting in Him.
Next consider an atheist who have not seen God.He knows nothing about religion.But he is a good person and loves a girl sincerely,ie love for the sake of love.Love itself is God.So if we Love the love,it's loving God .So unknowingly he loves God and as a result he will get some psychic powers..And eventually he will have some visions and become religious.So in both the cases the end result is the same, Man becoming perfect,becoming one with God/Brahma.
So God can be viewed as an entity or abstract ideas like Love,Kindness etc..
The Love between mother and child,between wife and husband ,between Guru and disciple are different forms of love.So God can be reached in many ways.
But it is difficult to have such intense,true love.
And it is not just theory ,see what Swami Vivekananda says in chapter
Divine Love,Complete works of Swami Vivekananda:
" Man rails in love with woman, and woman goes to die for man. The chances are that in five minutes John kicks Jane, and Jane kicks John. This is a materialism and no love at all. If John could really love Jane, he would be perfect that moment. His true nature is love; he is perfect in himself.
John will get all the powers of Yoga simply by loving Jane, although he may not know a word about religion, psychology, or theology. I believe that if a man and woman can really love, they can acquire all the powers the Yogis claim to have, for love itself is God. That God is omnipresent, and therefore you have that love, whether you know it or not.
I saw a boy waiting for a girl the other evening. . . . I thought it a good experiment to study this boy. He developed clairvoyance and clairaudience through the intensity of his love. Sixty or seventy times he never made a mistake, and the girl was two hundred miles away. He would say, "She is dressed this way." Or, "There she goes." I have seen that with my own eyes.
This is the question: Is not your husband God, your child God? If you can love your wife, you have all the religion in the world. You have the whole secret of religion and Yoga in you. But can you love? That is the question. You say, "I love . . . Oh Mary, I die for you! ". But if you see Mary kissing another man, you want to cut his throat. If Mary sees John talking to another girl, she cannot sleep at night, and she makes life hell for John. This is not love. This is barter and sale in sex. It is blasphemy to talk of it as love. The world talks day and night of God and religion so of love. Making a sham of everything, that is what you are doing! Everybody talks of love, yet in the columns in the newspapers we read of divorces every day.
When you love John, do you love John for his sake or for your sake? If you love him for your sake, you expect something from John. If you love him for his sake, you do not want anything from John. He can do anything he likes, and you will love him just the same."
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IT is good to love God for hope of reward, but it is better to love God for loves sake; and the prayer goes: O Lord, I do not want wealth nor children nor learning. If it be Thy will, I shall go from birth to birth. But grant me this, that I may love thee without the hope of reward - love unselfishly for loves sake.
-Swami Vivekananda