Some religions -old and new - believe we choose the lessons we come to learn. If we learn quickly, we can advance to more advanced lessons, if we refuse or aren’t capable of understanding our lessons, we repeat them, in one life or another. Just as settings, teachers and teaching styles vary, so do the subjective experiences and understanding of the lessons. Repeating them is karma. Demonstrating grasp and practical application is dharma. Choosing to incarnate to help others learn because one feels a deep empathy and compassion for everyone on the wheel of Samsara is bodhisattva.
Some of these religions believe we reincarnate until we have lived every experience from every possible perspective.
That said, back to my own cultural religious teachings, would I eat again from the tree of knowledge of good and evil? If I’m honest, on my worst days, no. On ok and best days? Yes. It’s good to experience things from various perspectives. Our imaginations have been constrained and lack ability. Physical and intellectual exercise is the remedy.
I believe so. Purity of heart is cultivating authentic “goodness.” That is, doing the “right thing” for the sake of the thing, not for reward or recognition, although that may be a by-product. Not necessarily “right” by social standards, while also recognizing that what is right for you may not be, for someone else. I noticed you said later you hold a Christian perspective. Jesus said the well don’t need doctors. He was a champion of the poor, outcast, and women. He forgave what temple authority wouldn’t. He interceded for his murderers. I would also refer you to the 51 Psalm.