What does the Bible say about troubles in the life of a Christian?

The Apostle Paul, in 2 Thessalonians 1:7, addresses Christians who are troubled, emphasizing that believers are not exempt from life's difficulties. Every true child of God experiences troubles, the primary one being sin, which causes ongoing conflict in one's life. These challenges can stem from unsaved family members, physical afflictions, and difficult circumstances or 'hard providences' that the Lord allows. Paul encourages believers to find rest amidst their struggles by grounding themselves in Christ and learning from Him.