Wesley and the cross

I am currently reading a book entitled Arminian Theology, by Roger Olsen. In it he says that John Wesley held to the penal substitution theory of atonement. He writes 'Wesley never tired of describing the great sacrifice of Christ and called it a propitiation of God's wrath, bearing the curse of the law and freeing humans from condemnation by paying the price for sins. These images and metaphors abound in Wesley's sermons. Believers are justified freely by God. Wesley declared, because of the atonement:

His sins, all his sins, in thought, word, and deed, are covered, are blotted out, shall not be remembered or mentioned against him any more than if they had not been. God will not inflict on that sinner what he deserved to suffer because the Son of his love hath suffered for him. And from the time we are "accepted through the beloved," "reconciled to God through his blood," he loves and blesses and watches over us for good, even as if we had never sinned.' [from Wesley's sermon entitled 'Justification by faith']