In the end, love is perfectly defined, and is as simple as He is complex. While there are many faces to it like a multi-faceted diamond, it’s whole is fully found in only one source. For us to fully express true love, our hearts and whole being, must be full of this love. Yes it is a heart thing, but so much more.
Beloved, let us love one another, for love is of God; and everyone who loves is born of God and knows God. He who does not love does not know God, for God is love. In this the love of God was manifested toward us, that God has sent His only begotten Son into the world, that we might live through Him.
(1 John 4:7-9)