The call.

Herman Witsius has written:

“This call contains the command of faith, by which all men without exception, to whom God vouchsafes the same, are enjoined to believe in Christ, in that way and manner which is revealed in the Gospel, Isa. xlv. 22. “look unto me and be ye saved all the ends of the earth.” But the method of believing is this: first, that a person do heartily acknowledge all men, without exception, and himself among the rest, to be liable to condemnation because of sin: and then, that he embrace the principal truths of the Gospel; namely that there is no salvation, but in Christ, nor any communion with Christ, but by a true and lively faith: moreover, that he do not neglect so great salvation, but renouncing all earthly enjoyments, and every false remedy for his sins, he only desire the righteousness of Christ, receive him as his Saviour, give himself up wholly to him, not doubting but in so doing he shall find rest to his soul. All and every one in particularly therefore, to whom the Gospel is preached, are not commanded directly to believe that Christ died for them. For that is a falsehood: but are commanded to proceed in that method I have now described; and not to take comfort to themselves from the death of Christ, before having acknowledged their own misery, and renounced every thing but Christ, they have given themselves up sincerely to him. We cannot therefore conclude from this general call, who they are for whom Christ died: but only this, that there is no other name given under heaven, in which we can be saved; and that in him, as an all-sufficient Saviour, every believer shall have life.”

(Witsius, Herman. The Economy of the Covenants Between God and Man, Volume I, Kingsburg, CA: den Dulk Christian Foundation, 1990, pp. 353.)