As Christ's ambassadors, we are to live to exalt Jesus Christ and Him crucified.
Reference: E.G. White, "The Upward Look," p. 85

Full text of the devotional: “God’s Work—Our Commitment,” March 12

To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation. 2 Corinthians 5:19.

However large may be a man’s claim to knowledge, to wisdom, unless he is under the teaching of the Holy Spirit, he is exceedingly ignorant of spiritual things. He may handle truth in such a way that little understanding is imparted to his inner heart life...

Place your entire dependence on the One who is able to keep the souls committed to His trust, able to imbue them with His Spirit, able to fill them with unselfish love for one another, thus enabling them to bear witness that He has sent His Son into the world to save sinners...

The root of all true self-sacrifice is an affection for the Lord Jesus so strong that it makes the wearing of His yoke easy and pleasant, and leads men to choose to learn His meekness and lowliness...

God’s servants have one common work. Their aim is to be to convert people to the pure truth of the Word of God. They are not to attach men to themselves, so that they will echo everything they may say, and carry out all the suggestions they may make.

Christ is the foundation of every true church. All who are brought to a new faith are to be established on Him. The plain, simple truths of the gospel are to be kept before minds. Christ crucified as the atonement for sin is the great central truth of the gospel, round which all truths cluster. To this great truth all other truths are tributary.

All truths, rightly understood, derive their value and importance from their connection with this truth. The apostle Paul makes this fact stand out in royal dignity. He calls the minds of all teachers of the Word to the importance of pointing souls to Christ as the only means of salvation. “God forbid that I should glory,” he says, “save in the cross of our Lord Jesus Christ, by whom the world is crucified unto me, and I unto the world” (Galatians 6:14)...

Let not man seek to fasten minds to himself. God Himself is the Founder of His church, and we have His unalterable promise that His presence and protection will be given to His faithful ones, who walk in His counsel. To the end of time, Christ is to be first. He is the source of life and strength and righteousness and holiness. All this He is to those who wear His yoke, and learn of Him how to be meek and lowly. He will not tolerate self-exaltation.—Letter 39, March 12, 1902, to Elder E. E. Franke, an evangelist.