I had a question about Mark 5:12
“so that ‘they may look and not perceive, and hear and listen but not understand, in order that they may not be converted and be forgiven.’”
Does this mean that God makes us not perceive Him as to keep us from Him? I’m very confused :S
I think you mean Mark 4:12.
Go to Matthew 12:13-15 where the same saying of Jesus is recorded, and you can see that a prophecy of Isaiah is what Jesus is referring to.
In passage verse 15, it says "For [for=because] the heart of this people became dull, and with their ears they scarcely heard, and they shut their eyes lest they see with the eyes and hear with the ears and
understand with the heart, and return and I heal them.
It is the people themselves who do not want to listen or to see.
Isaiah said something like “I will open my mouth in parables, and utter dark sayings from the foundations of order.” Order means a house well ordered and furnished (in Greek it’s Cosmos, from which we get, eg: cosmopolitan – an ordered city.)
Consider, in the Beginning (which is Genesis) looking to Adam and his son Abel, and also Cain. The purpose of these people had was to fill the earth and subdue it (put it back in order). If you look again at Jesus’ saying – the same idea is repeated in the parables; Growth of good things, and removal of bad things. Also notice, the crowds don’t bother to ask the meaning of these parables – they don’t seem to really understand that they are important – or else, they don’t want to know… They are people who are already outside the church by their choices.
Hope this gives you an inkling… Perhaps others will have more in depth commentary.

I’m just looking at the passage, and not researching exactly what Isaiah said, and the context of his prophecy – which is quite important in interpreting these kinds of passages, because there are often clues to the particular issues Jesus is addressing.
But I hope this gives you an inkling…
It really isn’t about God closing their eyes; it’s about his choosing to withhold forgiveness at least for a time. (There is only one sin that can’t be forgiven – the sin that never stops being done.)