Which comes first, faith or repentance? Here is John Calvin”
“Now, both repentance and forgiveness of sins – that is, newness of life and free reconciliation – are conferred on us by Christ, and both are attained by us through faith. As a consequence, reason and the order of teaching demand that I begin to discuss both at this point. However, our immediate transition will be from faith to repentance. For when this topic is rightly understood it will better appear how man is justified by faith alone, and simple pardon; nevertheless actual holiness of life, so to speak, is not separated from free imputation of righteousness. Now it ought to be a fact beyond controversy that repentance not only constantly follows faith, but is also born of faith. For since pardon and forgiveness are offered through the preaching of the gospel in order that the sinner, freed from the tyranny of Satan, the yoke of sin, and the miserable bondage of vices, may cross over into the Kingdom of God, surely no one can embrace the grace of the gospel without betaking himself from the errors of his past life into the right way, and applying his whole effort to the practice of repentance” (Calvin, Inst. III.iii.1).
Calvin says above “Now it ought to be a fact beyond controversy that repentance not only constantly follows faith, but is also born of faith.” I wonder, though, whether the Bible states that repentance follows faith. On this matter, here is Sinclair Ferguson
“Any confusion is surely resolved by the fact that wen Jesus preached “the gospel of God” in Galilee, He urged His hearers, “The time is fulfilled, and the kingdom of God is at hand; repent and believe in the gospel” (Mark 1:14–15). Here repentance and faith belong together. They denote two aspects in conversion that are equally essential to it. Thus, either term implies the presence of the other because each reality (repentance or faith) is the sine qua non of the other” (Sinclair Ferguson, “Faith and Repentance”).
That seems more like it: faith and repentance are two sides of the same coin? Actually not exactly: faith must logically, if not chronology, precede repentance.