Calvin on the primacy of righteousness by faith

Old Life quotes the following from Calvin in response to the teaching of Trent:

We, indeed, willingly acknowledge, that believers ought to make daily increase in good works, and that the good works wherewith they are adorned by God, are sometimes distinguished by the name of righteousness. But since the whole value of works is derived from no other fountain than that of gratuitous acceptance, how absurd were it to make the former overthrow the latter! Why do they not remember what they learned when boys at school, that what is subordinate is not contrary? I say that it is owing to free imputation that we are considered righteous before God; I say that from this also another benefit proceeds, viz., that our works have the name of righteousness, though they are far from having the reality of righteousness. In short, I affirm, that not by our own merit but by faith alone, are both our persons and works justified; and that the justification of works depends on the justification of the person, as the effect on the cause. Therefore, it is necessary that the righteousness of faith alone so precede in order, and be so pre-eminent in degree, that nothing can go before it or obscure it.

(“Acts of the Council of Trent with the Antidote,” in Selected Works, vol. 3, p.128)