Are all the world's sins forgiven and paid for by the atoning blood of Christ?
Yes. All the world's sins are forgiven and paid for by the atoning blood of Christ; God has totally paid them. Yet the lost person who spurns this provision in unbelief will still give an account for everything done in the body, coming before the great white throne.
Les explains that when he says all the world's sins are forgiven and God has totally paid them with the atoning blood of Christ, this does not mean the lost person will not have to give an account. The lost person can understand that his sins are forgiven, they are atoned for, and Christ died for him. But if he spurns it and in unbelief turns his back on it, then he must give an account for everything he does in the body as a lost person. Revelation 20 shows every unbeliever from Cain until the last one at the end of the ages coming before the great white throne. This is not the seat Christians will be at; it is only for the lost, only for unbelievers. Christians will not be at the great white throne. John saw the dead, small and great, stand before God, and the God here will be the Lord Jesus Christ, the Judge.