John Gill - Exposition
John Gill
A merry heart doth good [like] a medicine,.... Does the body good, makes it healthful and vigorous. Cheerfulness of spirit has a great influence upon the body, and much contributes to the health and welfare of it; see Ecclesiastes 9:7; and especially a heart full of spiritual joy, peace of conscience, flowing from the blood of Christ, joy in the Holy Ghost, a rejoicing in Christ Jesus and his...