Bullinger:
We must not here carefully and curiously search and dispute, whether all men be drawn by God, or whether faith be given only to a few? And albeit thou see that all men believe not, & even those which daily hear the word of God to withstand it, yet thou must not despair nor say: these therefore do not believe (the which indeed is true) because they are not of the number of the sheep of Christ, and therefore peradventure I am not elected also, nor shall be endued with faith by God, what shall it then profit me to hear sermons? But rather we must comfort ourselves with the most sweet promises of God’s hand. For the Lord says, “I will not the death of a sinner, but that he be turned and live” [Ezek. 18.]. And Peter says, “that God is patient toward us, and would not have that any man should perish, but that all should repent” [ 2 Pet. 3.]. And Paul says, the Scripture says, “everyone that believes in him, shall not be ashamed. For there is no distinction, either of Jew or Greek. For there is one Lord of all, rich unto all that call upon him” [Rom. 10.]. Therefore let every man be of good hope, that God in time, will give faith unto him also.
Henry Bullinger, Common Places of Christian Religion, (Imprinted at London by Tho. East, and H. Middleton, for George Byshop, 1572), 144-145.
Zwingli:
And the reason why he made the promise was none other than because of blessedness could not come to us, however much we toiled and sweated, while the fall of the first parent had not been atoned for. But when Christ, slain for us, appeased the divine justice and become the only approach to God, God entered into a new covenant with the human race, not new in the sense that he had only just discovered this remedy, but because he applied it at the right moment, having prepared it long before.
Exposition and Basis of the Conclusions or Articles Published by Huldrych Zwingli, (PA: Pickwick Publications, 1984) 2:224.