Matthew Henry Commentary Psalms 103:1-5

"Bless Jehovah, O my soul; And all that is within me, [bless] his holy name. Bless Jehovah, O my soul, And forget not all his benefits: Who forgiveth all thine iniquities; Who healeth all thy diseases; Who redeemeth thy life from destruction; Who crowneth thee with lovingkindness and tender mercies; Who satisfieth thy desire with good things, [So that] thy youth is renewed like the eagle." — Psalms 103:1-5 (ASV)

By the pardon of sin, that which kept good things from us is taken away, and we are restored to the favor of God, who bestows good things on us. Think of the provocation: it was sin, and yet it was pardoned. However many the provocations, yet all were pardoned! God is still forgiving, as we are still sinning and repenting.

The body bears the melancholy consequences of Adam's offense; it is subject to many infirmities, and so is the soul. Christ alone forgives all our sins; it is He alone who heals all our infirmities.

The person who finds his sin cured has a well-grounded assurance that it is forgiven. When God, by the graces and comforts of His Spirit, recovers His people from their decays and fills them with new life and joy—which is to them an earnest of eternal life and joy—they may then be said to return to the days of their youth (Job 33:25).