Many times, the Bible illustrates through a principle known by some as 'the Like/As principle'. It uses things in the natural to point to spiritual truth. They aren't the same but they are 'like/as'. Love is as Light...
What is Love and how can it be unconditional? To answer this question, I hope the following is of help to you.
Love is not something God does, it's who He is.
Both Love and Light reveal,
neither can be overcome,
and are not moved by what they 'see'.
Neither Love nor Light can fellowship with darkness;
because it's converted in their presence.
Both Love and Light are honest with present reality;
they do not embellish or hide from Truth.
Without them, we understand as a child;
With them, I know as I am known.
Because of His grace, Love is who you are, as Love (God) sees you. God (Love) sees no fault in you and no separation. Any separation is perceived. The Godhead is the perfect example of Love. Each of the three accept one another unconditionally. The invitation you're given, is the same. It's to fellowship with God, allowing yourself to be so loved and accepted that you no longer see yourself separated from God.
The Kingdom of God is where all this happens... within. The Spiritual you is the real you. And you'll continue even after your body is peeled away.
Grace 2 U,
David