In his letters, Paul repeatedly talks about the importance of discipline and perseverance, yet he also says he's learned the secret of being content in all circumstances. How can both be true, from the same author? How can he be content and press on toward a goal at the same time? And yet, there it is, in not-so-black-and-white. So I also see this tension as part of living in the gray—not just living in it, but going so far as to navigate in it and actually express God's image as a creative, alive, and engaged being.
Genesis 1 informs my view of progress: I don't think "formless and void" is as good as full-blown creation. I don't think a bunch of paints and a canvas are as beautiful as a Van Gogh (though they are almost certainly better than a Thomas Kinkade). Whether we call it progress (scary word) or creativity (fuzzy word), it's part of God's image to call forth good from chaos. I think His work in my life will involve that, even when it's also painful and messy.
If Paul's knowledge of contentment is simply a gift from God (and it may be—knowing that is learning the secret), it doesn't make the tension go away. If anything, it makes it greater: we still find a man who has contentment, yet also writes about the importance of discipline, self-control, perseverance, and pressing onward.
Either idea by itself is very "black/white." Together, however, we have gray. Paul didn't say, "Hey, now that I have this contentment thing, remember all that discipline stuff? Well, forget it, because you don't need it. Sorry about that." Nor did he say, "Sure, that contentment was nice and all, but it's unrealistic, so everyone get back to work, because God's not happy." We may simply want one idea to eliminate or override the other (it's easier that way), but Scripture only gives us the tension.
That's the gray I'm living in, so I don't believe that discipline, etc. are evidence of "black/white thinking." Without contentment and security in Christ's love, they would be. But since I'm embracing the tension rather than running from it, I'd further suggest that rejecting notions of discipline and progress so that one can have contentment is "black/white thinking." It trusts something much less than the gospel, which tells us that, despite the apparent paradox, they can and do exist together.
And that's a gray we can only live in by faith, which we know is a gift—but we still have to "pick up" what's been given to us. At staff this week, Phil talked about faith and longing and gave an awesome illustration. He said that when we cry out for God to give us faith, it doesn't make any sense for us to toss it away when He does: "It's like a child asking daddy for a glass of water, then just pouring it out on the ground." That's stuck with me. Paul's tension—indeed, all of Scripture's—includes waiting on that glass to be filled, as well as receiving it well when it is. There's no absence of longing; rather, there's instruction and example on how to keep living with it. We aren't the first to live in the gray, and we aren't alone or directionless in it.