I just read the short book The Gospel of Thomas: Annotated & Explained by Stevan Davies. The Coptic Gospel of Thomas was discovered in 1945 as part of the Nag Hammadi finds. While considered a Gnostic text for some time, most scholars have come around to viewing it as an authentic document of the first century, a production of the same cultural and religious environment as the canonical gospels. Crossan, for instance, relies on it to the same extent as any of the canonical gospels in his studies of Jesus and the early church. Like the Dead Sea Scrolls, the 114 sayings of Jesus preserved in the Gospel of Thomas are both interesting and controversial.
There's little structure to the book, it is just a listing of sayings -- some short one-liners and others brief parables. Many of the sayings and several of the parables track canonical passages very closely, such as "Jesus said: Blessed are the poor, for yours is the Kingdom of Heaven" (GT 54). But many of the verses are unfamiliar, and a few are unlike anything found in the canonical gospels. There is little narrative context to any of the sayings, they are generally introduced with a simple "Jesus said." I'm just going to quote a few of the more interesting shorter verses.
10 Jesus said: I have thrown fire on the world.
Look! I watch until it blazes.
25 Jesus said: Love your brother as your own soul.
Protect him as you protect the pupil of your eye.
42 Jesus said: Be one of those who pass by.
[or: Be passers-by.]
67 Jesus said: One who knows everything else
but does not know himself knows nothing.
77 Jesus said: I am the light above everything. I am everything.
Everything came forth from me, and everything reached me.
Split wood, I am there.
Lift up a rock, you will find me there.
Here are a couple of unfamiliar parables:
97 Jesus said: The Kingdom of the Father is like a woman who was carrying a jar full of grain. As she walked along a handle of her jar broke off and grain trickled out, but she didn't notice. When she arrived in her house, she put the jar down and found it empty.
98 Jesus said: The Kingdom of the Father is like a man who intended to kill a powerful man. He drew out his sword in his own house and stabbed it into a wall to test his own strength. Then he killed the powerful man.
The Gospel of Thomas stresses self-knowledge and the motif, seen in some canonical passages, that "the kingdom of God is within you." I'm not sure what to make of the Gospel of Thomas, but traditional Christianity appears to want nothing to do with it—it's only religious scholars who seem to take an interest in the text.