_First_, sincere: that signifies simplicity of purpose, and singleness of heart in following out that purpose. Sincere Christians cherish in their hearts no views, no principles, adverse to the Christian calling. The test of this sincerity is that a man shall be honestly willing to let light shine through him, to evince the true character of his principles and motives. Such a man is on the road to the final, victorious, and eternal sincerity. For the present there may be within him too much of that which hinders him, and mars his life. But if he is set on expelling this, and welcomes the light which exposes it, in order that he may expel it, then he has a real, present sincerity, and his course is brightening towards the perfect day. _Second_, without offence. This is the character of the man who walks without stumbling. For there are obstacles in the way, and they are often unexpected. Grant a man to be in a measure sincere--the call of the gospel has really won his heart. Yet as he goes, there fall in trials, temptations, difficulties, that seem to come upon him from without, as it were, and he stumbles: he fails to preserve the uprightness of his life, and to keep his eye fixed with due steadiness on the end of his faith. Suddenly, before he is well aware, he is almost down. So he brings confusion into his mind, and guilt upon his conscience; and in his bewilderment he is too likely to make worse stumbles ere long. He who would be a prosperous Christian has not only to watch against duplicity in the heart: he must give diligence also to deal wisely with the various outward influences which strike into our lives, which seem often to do so cruelly and unreasonably, and which wear some false guise that we had not foreseen. Paul knew this in his own case; and therefore he "studied to keep a conscience void of offence." We may have wisdom enough for our own practice as to this, if we know where to go for it. _Third_, filled with fruits of righteousness--which is the positive result, associated with the absence of guile and the freedom from stumbling. A tree that bears any fruit is alive. But one that is filled with fruit glorifies the gardener's care. "Herein is My Father glorified, that ye bear much fruit; so shall ye be My disciples." Distinct and manifold acts of faith and patience are the proper testimonies of the soul that is sincere and without offence. This is the line of things which the Apostle desires to see running its course towards the day of Christ. Now let us ask, In what circumstances is the believer placed for whom Paul desires it?