In union with God, we see ourself as children of God. The love of God purifies all our emotions and we see the world and its people as God sees them. No more maudlin sentiments and everyone is the same to us. This is not being harsh, only fair, as God loves us equally. Pure love is motivated by obedience to God alone with no meddling by our own emotions or views and carried out with no fanfare. Perhaps that's why God might mistakenly seem to be cold to some.