2 Timothy 1:6
When Paul admonishes us to "stir up the gift" in us, he is really telling us to discipline ourselves to put what we say we believe into action. He speaks most specifically about the gift of the Holy Spirit, but the intent of his admonition includes all of the truths we have received as a result of God giving us His Spirit.
Because of grace, the elect are responsible to God to act in agreement with these truths. To act contrary to them is to quench the Spirit. Resisting the truth stifles and smothers good results; it inhibits growth into God's image. Proverbs 25:28 says, "Whoever has no rule over his own spirit is like a city broken down, without walls." Such a person is defenseless against destructive forces that pressure him to submit. To do the right requires discipline, the self-control to act in agreement with truth, because virtually everything in life - including Satan, the world's enticements, and our appetites - works against our fervent submission to God. Thus, Paul charges us to exercise the control to stir up the gift.
John W. Ritenbaugh
Eating: How Good It Is! (Part Five)