A child in a family felt that his parents loved him unconditionally.
There's a song with a lyric "your love never fails". But a human love could "fail". A parent's love could someday fail, just because humans are generally subject to failure.
In the song, it is God's love that never fails.
The child or a parent feels what love is, and guesses that that love could conceivably end, or "fail". He may eventually imagine, or postulate, a more constant love. To give it a name, he could call it God's love.
The important thing about love, and about God as I imagine it, is not protection. It is not survival, nor everlasting life, nor any material success. The important thing about love is that one knows one is loved or has been loved or will be loved, or that oneself does love. Even just having been loved is worth a lot.
If the love and the loving entity fade away and there is no survival, that is less important than the fact that one was loved, or even that one has loved.
The beautiful world, and even all earthly pleasures, matter less than love. When in old age one half of a long-happily-married couple dies, the other is desolate. The world is still the same objectively on the outside, but the feeling is all different or absent.
So, for common human existence, sometimes there is desolation. But it is possible to realize that a love once loved is forever. (At the least, it "exists" in a multi-dimensional universe that encompasses all "times".) It is possible that there is an everlasting love, and if one knows an everlasting love then that's what really matters, even if all other good things end.
The usual name for everlasting love is God's love.
