He sent his word, and healed them, and delivered them from their destructions. Psalms 107:20 KJV
Jesus is the Word sent by God to deliver and heal us. Just as He forgives our sin so He makes us whole.
Who forgiveth all thine iniquities; who healeth all thy diseases;Psalms 103:3 KJV
As a believer we hold these truths self evident. It is God’s will to heal.
Beloved, I wish above all things that thou mayest prosper and be in health, even as thy soul prospereth.
3 John 1:2 KJV