Atheistic – theological inquiry on FB: “If free will is the source of all evil then is there sin in Heaven or no free will?”
Free will exists in the Kingdom of God as represented by the choice of Lucifer to rebel against God in a coup d’état where Lucifer via his charisma recruited one-third of the angelic realm to follow him in his war against God the Father (Revelation 12:9). It is Lucifer’s rebellion via free will that initiated the creation of matter, Time, this Universe, our genome, as God the Father extricated Lucifer and his destructive sin from the Kingdom and placed him on Earth to deal with the rebellious cherub angel partially within the constraints of Time and physics (Isaiah 14; Ezekiel 28:11ff; Luke 10:18; Rev. 12:9). This was done because “nothing impure” will be permitted to exist within the Kingdom of God (Revelation 21:27).
Mankind, like the angels, has been given free will so that love and relationship with God can manifest with purity and authenticity. Sin and death entered Time via our father Adam’s free will (1 Corinthians 15:22) and yes, free will is relevant in the Kingdom of God when the redeemed occupy same with our Lord (2 Corinthians 5:8). Both the angels and mankind possessing volition will not desire disobedience/sin/rebellion because they both will have witnessed 7000+ years of the horrors of sin, death, carnage, suffering, misery, hopelessness, deception, that accompanies sin all of which was initiated by a rebellious, covetous, cherub angel; therefore, in our sinless resurrection body (Philippians 3:21) that is free from a sin-nature in conjunction with the lessons learned during our sojourning upon the Earth, mankind nor the angles will desire anything but God’s perfect will as we will know via experiential relevance that sin is suffering and horror and when compared with the love and communion and fellowship of our beautiful God…we will pursue love and righteousness with complete obedience because we know that God’s way is the way of peace, joy, contentment, forever.