Philippians 3:15-19

v15-16: Between Christians who "in all the great things" agree ("that Christ is a Christian's all, that to gain Christ and be found in him involves our happiness both here and in the next life"), there will be other relatively insignificant matters on which they differ.  When this happens, we are to bear with one another and to "wait until God gives... a better understanding, which he will do in his good time."

v17-19: How do you spot a false teacher?  They are those whose "concern is their physical appetite," who not only sin but also boast of it, who "are taken up with worldly things... and have no enjoyment of spiritual and heavenly things." They may profess faith in Christ, but their lives tell a different story.  Though "their way of life seems pleasant... death and hell lies at its end." Do not follow their example.