Psalms 103:3

The two clauses are joined for a reason, and the joining is the argument.

Forgives all your sins. Heals all your diseases. David puts them in the same line, with the same structure and the same word all, as though they were two instances of one activity rather than two separate services.

That pairing runs through Scripture and it is not accidental. Both describe something wrong being put right in a person who cannot put it right themselves. Both require someone with capacity you do not have. And in the ancient world both were understood as belonging to the same domain — which is why, when Jesus wanted to demonstrate authority to forgive, he healed a paralysed man and said the two were interchangeable proofs.

The difficulty, of course, is the word all in the second clause. Sins are forgiven now; diseases are plainly not all healed now, and David — who wrote elsewhere about his bones wasting away — knew it.

Which is why the psalm's horizon matters. Five verses later it says he redeems your life from destruction and satisfies you with good so that your youth is renewed. David is not describing a clinic. He is describing a trajectory, of which forgiveness is the part already completed and healing is the part still arriving.

And the whole list is addressed to himself. Bless Yahweh, my soul, and don't forget.