We are born without grace, and with a fallen sinful nature. But we are not born totally depraved, and we still have free will. When we are baptized, or give our life to the Lord, we pass from death to life and are born again. After that, we re-enter the State of Grace, and have power from God to overcome sin. I believe sinless perfection is possible, as John Wesley taught. "I write these things to you, little children, that you may not sin" (1 Jn 2:1), and "Be Perfect, therefore, as Your Heavenly Father is Perfect". (Mat 5:48). Wesley did not like Calvinism. I don't think God likes it much either. There may be Good Christians who believe those errors, but comparing it to the Scriptures and Church Fathers shows that it is a later novelty. Finally, God is not the Author of Evil, that's Satan. And that is the issue with confusing the two and saying God is as responsible for Evil as for Good. He is not. All good things, as Saint James says, are from the Father of Light above, but Evil is from Satan, or from us.