Romans 5:3-5

Amplified Bible

³ And not only this, but [with joy] let us exult in our sufferings and rejoice in our hardships, knowing that hardship (distress, pressure, trouble) produces patient endurance; ⁴ and endurance, proven character (spiritual maturity); and proven character, hope and confident assurance [of eternal salvation]. ⁵ Such hope [in God’s promises] never disappoints us, because God’s love has been abundantly poured out within our hearts through the Holy Spirit who was given to us.