[TheRealThing]

Those who have come to grips with those truths as listed above, are truly born again unto life eternal and, to understanding. Their hearts are from that point forward, illuminated through the ministry of the Holy Spirit.
Hebrews 10:31-32 (KJV)
31 It is a fearful thing to fall into the hands of the living God.
32 But call to remembrance the former days, in which, after ye were illuminated, ye endured a great fight of afflictions;


The mystery and work of salvation does not end there however, that is but the beginning because illuminated too, is the mind. Thus one of the great gifts of a right relationship with our Lord other than eternal life is understanding. And do we ever need that in today's world!
1 Corinthians 2:14 (KJV)
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.


Thus the greatest of thinkers across time without Christ, have only a part of reality. Stephen Hawking (a man who studied light) comes to mind, and his contentions that aliens are real and God is a fiction.
John 8:12 (KJV)
12 Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.

All truth is of God and as such is unseparable, Spiritual light and secular light.