Jean Calvin
Nothing will be ambiguous if we hold fast to what ought to be clear from the foregoing: that there are two kinds of call. There is the general call, by which God invites all equally to Himself through the outward preaching of the word – even those to whom He holds it out as a savor of death (cf. 2 Cor. 2:16), and as the occasion for severer condemnation. The other kind of call is special, which He designs for the most part to give to the believers alone, while by the inward illumination of His Spirit he causes the preached Word to dwell in their hearts.
John Calvin