To each is given the manifestation of the Spirit for the common good. --
When we read this familiar verse, it is easy to unconsciously substitute an indefinite article when we get to "the" manifestation of the Spirit. That's because we think that we each have only "a" manifestation of the Holy Spirit while others have a different one. We don't think our manifestation of the Spirit is very big. Or definite. We assume others have a greater piece of God. But Paul was quite intentional in saying that the manifestation or revelation of God's Spirit has come to each of us.
The Bible consistently proclaims that in giving you the Spirit and the Son, the Heavenly Father has already given all that he has to offer. He held back nothing. To each, including you, is given the manifestation of the Spirit who engrafts you into the Son's beloved relationship with the Father. In other words, in giving you the Spirit and Son, the Father has given himself. How could you ask for more?
Of course, there is so much more for you to learn about God, but you are always learning more about the God you've already received. It's analogous to newly born children who have to grow up to understand the blessings they have had all along. And the mark of a grown-up is realizing that these blessings were not just for your benefit, but to be used for "the common good." You are not God's only child. When you understand the significance of that, you'll also understand why you have been so blessed.
-- Craig Barnes