How do we know spiritual affliction is useful for Christians?

The necessity of spiritual affliction is reinforced through various biblical passages that highlight how God uses such experiences to instruct His people. Affliction, whether spiritual or physical, serves to open our eyes to our need for reliance on God's sustaining grace. In 1 Corinthians 1:30, it is stated that believers are in Christ because of God's initiative. This emphasizes that we are not able to achieve righteousness on our own but require God's transformative work in our hearts, often brought about through affliction.