What does the Bible say about having a troubled heart?

In John 14:1, Jesus directly tells His disciples, 'Let not your heart be troubled. Ye believe in God, believe also in me.' This teaching underscores that while there are valid reasons for distress, particularly regarding one's spiritual condition, we are not to be consumed by anxieties over daily concerns. The troubles we face should direct us toward faith rather than despair. In troubling times, we are to remember God's sovereignty and trust that everything is under His control, reinforcing our confidence in Him as our ultimate source of peace.