It is not in ourselves that these blessings are contained. Let us never imagine that the atoning sacrifice of Christ was intended to make an angry God willing to be merciful. That is not the truth. Jesus Christ died, not to create mercy and love in the heart of God, but to open a just and righteous way for that mercy and love which is there from all eternity. God's mercy and love went forth to us before the Saviour came.
Spiritual blessings are heavenly blessings.
They come from heaven and are of a heavenly nature. We enjoy these in Christ because He has purchased them for us and has gone there to possess them for us in His own name. All things are yours and you are Christ's, and Christ is God's. It all starts with God's sovereign choice.