In administering human society God so tempers his providence that, although kindly and beneficent toward all in numberless ways, he still by open and daily indications declares his clemency to the godly and his severity to the wicked and criminal. For there are no doubts about what sort of vengeance he takes on wicked deeds. Thus he clearly shows himself the protector and vindicator of innocence, while he prospers the life of good men with his blessing, relieves their need, soothes and mitigates their pain, and alleviates their calamities; and in all these things he provides for their salvation. And indeed the unfailing rule of his righteousness ought not to be obscured by the fact that he frequently allows the wicked and malefactors to exult unpunished for some time, while he permits the upright and deserving to be tossed about by many adversities, and even to be oppressed by the malice and iniquity of the impious. But a far different consideration ought, rather, to enter our minds: that, when with a manifest show of his anger he punishes one sin, he hates all sins; that, when he leaves many sins unpunished, there will be another judgment to which have been deferred the sins yet to be punished. Similarly, what great occasion he gives us to contemplate his mercy when he often pursues miserable sinners with unwearied kindness, until he shatters their wickedness by imparting benefits and by recalling them to him with more than fatherly kindness!
~John Calvin~
The Institutes of the Christian Religion (Louisville, KY; Westminster John Knox Press; 1974) Vol. 1.5.7. p. 59-60.
The Old Guys 
Martin Luther – We Need the Forgiving Mercy of God
26 Feb[16] But I say, walk by the Spirit, and you will not gratify the desires of the flesh. [17] For the desires of the flesh are against the Spirit, and the desires of the Spirit are against the flesh, for these are opposed to each other, to keep you from doing the things you want to do. – Galatians 5:16-17 ESV
Look how bold the apostle is–he denies free will outright! We cannot do what we want, however hard we try…. Even the grace of God has not made the will perfectly free…. In this life, spirit and flesh battle it out, neither one being able to eliminate the other, although the spirit does manage to tame the flesh against its will and subject it to itself. No one can claim to have a clean heart or to be cleansed from filth, for whatever my flesh does, I do…. In every work of ours we need the forgiving mercy of God.
~Martin Luther~
Reformation Commentary on Scripture – Galatians, Ephesians (Downers Grove, IL; IVP Academic; 2011) p. 190
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