This isn’t some whishy-washy religious feelgood cliche.
God wants you to know that He loves you, even if you are the most detestable person in the world, He loves you (a WHOLE LOT!) unconditionally. And He wants you to know this because if you choose His side you will FEEL AMAZINGLY GOOD when you die, but if you pick the other side you will be cast into darkness. The real sadness and terror of hell is knowing that you are eternally separated from GOD who is the source of all goodness and love. This means you are ETERNALLY SEPARATED FROM ANY HOPE of feeling loved, accepted, cared for, etc. INSTEAD OF eternally separated from all DARKNESS and negative feelings.
God is light, and in Him there is no darkness at all.(John 1:5)