Moreover, Holy Scripture most especially highlights this eternal and undeserved grace of our election and brings it out more clearly for us, in that it further bears witness that not all people have been chosen but that some have not been chosen or have been passed by in God’s eternal election — those, that is, concerning whom God, on the basis of his entirely free, most just, irreproachable, and unchangeable good pleasure, made the following decision: to leave them in the common misery into which, by their own fault, they have plunged themselves; not to grant them saving faith and the grace of conversion; but finally to condemn and eternally punish them (having been left in their own ways and under his just judgment), not only for their unbelief but also for all their other sins, in order to display his justice.
And this is the decision of reprobation, which does not at all make God the author of sin (a blasphemous thought!) but rather its fearful, irreproachable, just judge and avenger.
Those who do not yet actively experience within themselves a living faith in Christ or an assured confidence of heart, peace of conscience, a zeal for childlike obedience, and a glorying in God through Christ, but who nevertheless use the means by which God has promised to work these things in us — such people ought not to be alarmed at the mention of reprobation, nor to count themselves among the reprobate; rather they ought to continue diligently in the use of the means, to desire fervently a time of more abundant grace, and to wait for it in reverence and humility. On the other hand, those who seriously desire to turn to God, to be pleasing to him alone, and to be delivered from the body of death, but are not yet able to make such progress along the way of godliness and faith as they would like — such people ought much less to stand in fear of the teaching concerning reprobation, since our merciful God has promised that he will not snuff out a smoldering wick and that he will not break a bruised reed. However, those who have forgotten God and their Savior Jesus Christ and have abandoned themselves wholly to the cares of the world and the pleasures of the flesh — such people have every reason to stand in fear of this teaching, as long as they do not seriously turn to God.