Hi John,
I'd like to comment that the question you could be asking (yourself), should be more about whether the gospel writers would want to mislead you by lying about what actually happened?
Maybe if you have lied sometimes, you feel you don't trust yourself to tell the truth, and thus it seems easy to suspect others of not telling the truth either.
As I see the question of reliability, it's not so much whether the 'writings' are 'reliable', but whether the [i][b]writers[/i][/b] are reliable [u]witnesses[/u]. A witness is someone who tells what they have seen with their own eyes, honestly. (They may not have noticed every detail. Try asking two people independently, to describe the same view from a window. You'll be surprised by the things which each individual feels important to mention - or leave out.
You also have to ask yourself why anyone would testify to seeing something they [i]didn't[/i] see, (why they would lie), when that specific testimony is going to get them put to death?
This matter of whether the writers are reliable, runs right across the whole Bible, and I think you only have to read Hebrews 11 to realise their testimony was not received by 'the world' because the world was unwilling to come to the light. There is also Peter's claim: 2 Pet 1:16.
I ask you, what would it have been like to look into the eyes of the Ancient of Days Himself, the eternal I AM, the Creator of the heavens and the earth? You think they might have lied? You don't think that spending more than three years with God Incarnate was a transforming experience?
If you read the gospels closely, you'll see that by the last supper, they have given up their own wisdom. They know that Jesus knows [i][b]everything[/b][/i].
Now, you said this, and it is very revealing. (Luke 6:45; Matt 12:34)
Also in matthew and mark it says the robbers mocked or reviled Jesus while luke says he asked for forgiveness, [b]i understand he could have changed his mind[/b] [u]later[/u].
When might that have been?
Think about it.
Jesus died (gave up the ghost) at the time of the evening sacrifice (3pm), and the thieves had their legs broken to kill them before dusk (6pmish I believe).
That man was on a cross the whole time from what Jesus said to him, until he [u]died[/u]. Heb 9:27. Why would that thief decide he didn't want to go to Paradise with Jesus? What better option did he have? Seriously?
Isn't this question - about whether the thief could have changed his mind, really just a reflection of your own ambivalence about whether to mortify the flesh, or carry on sinning? It isn't anything to do with the [i]reliability of the gospels[/i] at all... or if it is, it is not about whether they are true or not, but about whether you are going to stake your life on them being true, like so few others have done before you.
Matt 7:13 (strait gate = Door of sheepfold)
God wants us to grapple with Him, and to need to [i][b]know[/b][/i] Him more than we need to get our own way - Gen 32:24, 25, 26; Isa 45:11, 12, 13.