What does the Bible say about spiritual sickness and healing?

In the Bible, spiritual sickness is often associated with sin, emphasizing humanity's need for healing that only Christ can provide. In Mark 1:32-34, sick individuals are brought to Jesus for healing, illustrating their inability to heal themselves. Just as these individuals were physically sick, we are spiritually sick due to sin, as stated in Psalm 86, where the psalmist expresses a deep need for God to listen and respond. Sin's consequences manifest in both physical ailments and spiritual separation from God, which only Christ can remedy through His perfect sacrifice.