The Bible tells us that God is love. John emphasizes just how important this aspect of God’s nature is in 1 John 4. He says that if we don’t love then we don’t actually know God. God is so defined as being love that if we have a relationship with Him, we will love as well. It is a wonderful idea to contemplate.
It is not that God shows love or God is able to love, but He is love. Love is central to God’s identity. What’s more, there are a number of Greek words that John could have used to say love in this context. He chose agapos. It is a word that means an unconditional, self-less love. It is the love of a parent for a child or a husband for his wife. God is also limitless and eternal so His undeserved love is also boundless and never-ending.