Now, if we were going to expand that, or amplify it in the English, it would read somewhat like this: The God, as to His nature, is love. What it means, then, is God is a loving God. Most of the gods in the ancient world, in Greek mythology, were wrathful, vengeful, angry, picky things who had the same foibles, the same weaknesses, as human beings. They were not 'loving' gods. But the God is a loving God. So it is not to be understood that loving is one of God's activities; but rather that every activity of God is 'loving'. Therefore, if He creates, He creates in love. If He rules, He rules in love. If He judges, He judges in love. All that He does is an expression of His nature.
Now, let us think about this in reference to man. We are still talking about how God is the source of this love, and man, by nature, does not have it. Man was made in the image and the likeness of God (Genesis 1:26-28). But, God is described as being spirit. God is Spirit (John 4:24). And we find here that God is love. Now contrast that to man. Man is flesh. You see, the image begins to change. We are not quite in the image of God, are we?
Not only that, but the Bible describes us as being carnal. In this case, I am using it in the sense of being fleshly or physical. We are self-centered, and we are deceitful. What this means in practical fact is that man cannot be what he is meant to be - in the image of God - until he loves as God loves. Until his nature is the same as God's, we will never really be in the image of God. This is the essential thing that must be changed in man. Of course, you understand that, because of receiving of the Spirit of God, we are now partakers of the divine nature, which Peter states there in one of his epistles.
So, if man is to achieve what he is meant to be, then we must love, but we must love with the love of God.