If you were trapped in a car crash and you were bleeding to death, you'd want to be rescued, unless you were suicidal.
That's what salvation is all about. It's a massive rescue mission that has taken countless thousands of years and is finally coming to a climax.
As spiritual beings, we are trapped in physicality. We depend upon physical methods for perception and action. Without our Homo sapiens bodies we cannot see, think to plan, or move anything. This is the "Darkness."
Genesis 1:26 tells us that we were created in the image and likeness of God. And we have to be fully aware that God is not Homo sapiens!
When one achieves the everlasting life of which Jesus spoke, one regains the "Light" of independence from physical dependency. One has become again a child of God, rather than a trapped, "dead" asleep soul, locked in the cycle of birth-death-rebirth.
Peter saw this "Light" for a few moments when he stepped out of his storm-tossed boat onto the unsettled Sea of Galilee to stand on the water before his master. John the Baptist forgot the "Light" when he forgot who he really was (Elijah reborn) and forgot his mission to prepare the way for Jesus, thus becoming a stumbling block.
Salvation is not easy. So many who think they already have it will be rudely awakened by the fact that they're not even close. It takes incredible humility, and a willingness to let go of all this world's attachments. I have seen miracles and glimpsed the "Light," but long to make it permanent and pure. I wish that for everyone.