What does the Bible say about a troubled heart?

In John 14:1, Jesus tells His disciples, 'Let not your heart be troubled: ye believe in God, believe also in me.' This is a significant invitation to trust in Him amid life's disturbances. The context here is that Jesus was sharing profound truths with His disciples right before His impending death, acknowledging their troubled hearts as they faced the uncertainty of His departure. He assures them of a prepared place in the Father's house, emphasizing the importance of faith in His promises. This assurance offers hope and stability, reminding believers that while troubles come, they can find peace through faith in Christ's provision and His eternal promises.