Why do Christians experience affliction?

In 2 Corinthians 4, Paul explains that affliction is an expected part of the Christian experience. Believers face tribulations not because of a lack of faith but rather to deepen their dependence on Christ. Afflictions serve to remind us that we are not self-sufficient and that true strength comes from God alone. Through suffering, we are also able to comfort others, as our own experiences of God’s faithfulness enable us to share His comfort with those who are suffering similarly. This reflects God's clear plan for our sanctification.