Since I'm in the commentary-quoting mode, here's a nice quote from Calvin's commentary on 1 John 2:17.

In the ESV, here's the verse:

And the world is passing away along with its desires, but whoever does the will of God abides forever.

And here's Calvin:

By saying that they who do the will of God shall abide forever, or perpetually, he means that they who seek God shall be perpetually blessed. Were anyone to object and say that no one doeth what God commands, the obvious answer is that what is spoken of here is not the perfect keeping of the law, but the obedience of faith, which, however imperfect it may be, is yet approved by God. The will of God is first made known to us in the law; but as no one satisfies the law, no happiness can be hoped from it. But Christ comes to meet the despairing with new aid, who not only regenerates us by his Spirit that we may obey God, but makes also that our endeavour, such as it is, should obtain the praise of perfect righteousness."

I always find it interesting that Calvin's detractors paint him as a stern, cold-hearted theologian. But when you actually read Calvin, you see the pastor's heart shine through in everything he writes!