"The Gospel of Thomas (also known as the Coptic Gospel of Thomas) is a non-canonical sayings gospel. It was discovered near Nag Hammadi, Egypt, in December 1945 among a group of books known as the Nag Hammadi library"
https://en.wikipedia.org/wiki/Gospel_of_Thomas
"The Gospel of Thomas is a Coptic manuscript discovered in 1945 at Nag Hammadi in Egypt. This manuscript contains 114 sayings attributed to Jesus. Some of these sayings resemble sayings found in the Gospels of Matthew, Mark, Luke, and John. Other sayings were unknown until their discovery or even run counter to what is written in the four Gospels."
https://www.gotquestions.org/gospel-of-Thomas.html
"This "secret sayings" gospel does not tell the story of Jesus' life, but rather is a list of over 100 of his sayings, some of which are familiar to readers of the New Testament, others enigmatic and strange."
https://www.pbs.org/wgbh/pages/frontline/shows/religion/maps/primary/gthomas.html
"These are the hidden words that the living Jesus spoke. And Didymos Judas Thomas wrote them down."
https://www.biblicalarchaeology.org/daily/biblical-topics/bible-versions-and-translations/the-gospel-of-thomas-114-sayings-of-jesus/
"1. And he said, "Whoever discovers the interpretation of these sayings will not taste death.""
http://www.gnosis.org/naghamm/gosthom.html
"Jesus told parables so that people would not understand what He was saying, and He had very specific reasons for doing this."
https://redeeminggod.com/jesus-parables-are-confusing/
"Many Christians believe that Jesus taught in parables to make His message clear, but that is not biblical. Even His disciples were in the dark and did not understand. Repeatedly, they asked Jesus to explain the parables to them."
https://goodnewsaboutgod.com/studies/spiritual/home_study/parables.htm