What is the Biblical basis for Universal salvation?

Universal salvation, or universal reconciliation is the belief that God will eventually reconcile Himself with every *immortal soul*. That is, everyone will be saved. This doctrine has a long history. It's always been a minority view, but there have been proponents since, at least, the third century. It seems to me that this belief quite clearly contradicts the teaching of the Bible. For example, reading 2 Thess 1:7-9 (NLT): > And God will provide rest for you who are being persecuted and also for us when the Lord Jesus appears from heaven. He will come with his mighty angels, in flaming fire, bringing judgment on those who don’t know God and on those who refuse to obey the Good News of our Lord Jesus. They will be punished with eternal destruction, forever separated from the Lord and from his glorious power. Now, clearly it can't be this simple, since there have been a lot of people that believed in Universal salvation. Origen , for example, probably knew the scripture quite well. What are the Biblical arguments **for** Universal salvation?