The belief we came from monkeys is wrong, there isn't a linear evolution track between the monkeys and the apes. Monkeys and the Great Apes(which humans are part of) did originate from the same species at some time, but have both evolved along different lines since the split. As with Monkeys and Apes, the human line also split and evolved along seperate lines as well. It was estimated that about 4 millionm years ago the human and last Ape(the chimp) line split again, but this has now been pushed back to about 7 million years ago since a recent find pushed the bipedal ape(human line) back to 6.5 million years. Then within each Ape lineage there are several branches that evolved alongside of and died off leaving what we have today. The homo sapien lineage evolved along side the Neanderthal lineage, humans are not evolved neanderthals as a lot of people think. Both Humans and Neanderthals existed at the same time in Europe inhabiting the same region up until about 100-125k yrs ago when they vanished(likely killed off/out bread by humans), i.e. survival of the fittest.

Here is a question for all those who believe in God to ponder, not answer here. Since God is a perfect being and a perfect being cannot create anything imperfect(even by trying) aren't all humans already perfect and have no reason to fear not going to heaven, regardless of our actions here on earth. Our use of "Free Will" and the "Original Sin" cannot keep us out of heaven because God created "Free Will", and everything we do with "Free Will" even the "Original Sin" is a perfect act because God created us, and everything a God creates is perfect.