John Calvin Commentary Romans 5:11

"and not only so, but we also rejoice in God through our Lord Jesus Christ, through whom we have now received the reconciliation." — Romans 5:11 (ASV)

And not this only, etc. He now ascends to the pinnacle of glorying. For when we glory that God is ours, whatever blessings can be imagined or wished then follow and flow from this fountain. For God is not only the chief of all good things but also possesses in himself the sum and substance of all blessings, and He becomes ours through Christ.

We then attain this by faith—that nothing is lacking for our happiness. Nor is it in vain that he so often mentions reconciliation: first, that we may be taught to fix our eyes on the death of Christ whenever we speak of our salvation; and secondly, that we may know that our trust must be fixed on nothing else but on the expiation made for our sins.