Servant-thinking is humble, acknowledging that God is sufficient. Servant-thinkers will look for His grace in their weaknesses; they do so because they think Theocentrically. Biblical, that.
And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me. 2 Corinthians 12:9
“Both Lutherans and Calvinists answered the question ‘What must I do to be saved?’ by saying that Spirit-worked repentance toward God and faith in the Lord Jesus Christ and His substitutionary work of atonement are necessary. But Lutherans had a tendency to remain focused on the doctrine of justification, whereas Calvinists, without minimizing justification, pressed more than Lutherans toward sanctification, which asks, ‘Having been justified by God’s grace, how shall I live to the glory of God?’” (Joel R. Beeke, Living for God’s Glory: An Introduction to Calvinism, p. 11).
A servant-thinker is one who “adopts God’s world as his own.” Therefore, “the believer [servant-thinker] . . . is affirming creation as it really is; he is accepting creation as the world that God made, and he is accepting the responsibility to live in that world as it really is.”
 John Frame, The Doctrine of the Knowledge of God, p. 28.
 Ibid., p. 28.
“To be a creature is to be limited in thought and knowledge, as in all other aspects of life. We are limited by our Creator, our Lord. We have a beginning in time, but He does not. We are controlled by Him and subject to His authority; we are the objects of ultimate covenant blessing or cursing, and so the nature of our thought should reflect our status as servants. Our thinking should be ‘servant-thinking’” (John Frame, The Doctrine of the Knowledge of God, p. 21).