Romans 5:3 note 1
31 Tribulations are part of the "all things" in 8:28 that God causes to work together for good that we might be sanctified, transformed, and conformed to the image of His Son, who has entered into glory. Because of this, we can receive tribulations as the sweet visitation and incarnation of grace and thereby boast in them. Through tribulations the killing effect of the cross of Christ on our natural being is applied in us by the Holy Spirit, making the way for the God of resurrection to add Himself to us (see 2 Cor. 4:16-18).