Calvin:

VIII.2. God’s will that all be saved All this Pighius contradicts, adducing the opinion of Paul (I Tim 2.4): God wills all to be saved. That He does not will the death of a sinner is to be believed on His own oath where He says by the prophet: As I live, I do not will the death of a sinner, but rather that he may be converted and live (Ezek 18.23, 33.1 I). But I contend that, as the prophet is exhorting to penitence, it is no wonder that he pronounces God willing that all be saved. But the mutual relation between threats and promises shows such forms of speech to be conditional. To the Ninevites, as also to the kings of Gerar and Egypt, God declared that He would do what He was not going to do. Since by repentance they averted the punishment promised to them, it is evident that it was not firmly decreed unless they remained obstinate. Yet the denunciation had been positive, as if it were an irrevocable decree. But after terrifying and humbling them with the sense of His wrath, though not to the point of despair, He cheers them with the hope of pardon, that they might feel there was room for remedy. So again with the promises which invite all men to salvation. They do not simply and positively declare what God has decreed in His secret counsel but what He is prepared to do for all who are brought to faith and repentance. But, it is alleged, we thereby ascribe a double will to God, whereas He is not variable and not the least shadow of turning falls upon Him. What is this, says Pighius, but to mock men, if God professes to will what He does not will? But if in fairness the two are read together: I will that the sinner turn and live, the calumny is dissolved I without bother. God demands conversion from us; wherever He finds it, a man is not disappointed of the promised reward of life. Hence God is said to will life, as also repentance. But the latter He wills, because He invites all to it by His word. Now this is not contradictory of His secret counsel, by which He determined to convert none but His elect. He cannot rightly on this account be thought variable, because as lawgiver He illuminates all with the external doctrine of life, in this first sense calling all men to life. But in the other sense, He brings to life whom He will, as Father regenerating by the Spirit only His sons

Calvin, The Eternal Predestination of God (London: James Clark, 1961), 105-106.