I like the little ESV Scripture of the Day on my sidebar. Today it says:

But now that you have been set free from sin and have become slaves of God, the fruit you get leads to sanctification and its end, eternal life.
-- Romans 6:22

Here's that passage in my beloved NKJV:

But now having been set free from sin, and having become slaves of God, you have your fruit to holiness, and the end, everlasting life.
-- Romans 6:22

And, although it's not inspired Scripture, here's a snippet from 1 Clement:

And giving heed to His words, you stored them up diligently in your hearts, and kept His sufferings before your eyes. Thus a profound and rich peace was given to all, together with an insatiable desire to do good, and an abundant outpouring of the Holy Spirit fell upon everyone as well.
-- 1 Clement 2:1 & 2

I like the phrase in 1 Clement, "an insatiable desire to do good." To me, that's a concise, yet effective, way to describe the Holy Spirit at work in a believer.

I also take note of the order of things in the aforementioned passages. First comes being set free from sin and being slaves of God (or giving heed to His words, et cetera), then comes the fruit to sanctification/holiness, and, ultimately, eternal life.