God is the Light.
It is impossible for him to be darkness.
He is the Truth, which is why He cannot lie. If He did _ just once, He could not require laws for us to keep, righteousness for us to abide in. He would not be perfect. Faith in Him would be marginal, we could not count in it.
But let's consider this ... if it was only just one lie to each us and we forgave Him and maybe it would be for our own good, then I wouldn't have a problem with that.
What if he allowed us to believe something in order that we would persevere, to remain happy, continue to be joyful for the rest of our lives and then when we died, we would find out the Truth, be devastated for a moment and then He would wipe away the tears?
Maybe that would fall into God causing all things to work together for good for those who love the Lord, for those who are called to His purpose?
Example: My father was an atheist all his life and a year before he died, his wife caught him praying to God. This message to me gave me hope that He made his peace with God. It made me happy. What if His prayer was empty, did't get through? What if he wasn't saved but God let me believe that He was to spare my grief?
My mom was a liberal, rebellious woman who glorified herself and never believed that Jesus rose from the dead. She believed He was a good oerson but thought He was just murdered. She thought it was a just a story and would argue about her beliefs instead: reincarnation, the Universal Energy Force, aliens, etc. Just weeks before she died, she told me I had been brain washed by the Bible, by Chrisitianity.
Three days before she died, I called her and she started singing about Jesus, saying that Jesus loved her and had His hand in her back, that she always believed! What? For thirty years I 've been chipping away at her false beliefs and philosophies to no avail. I was shocked. I believe something happened ... but what if God wanted to spare me?