That we must trust in God only, and in Him we must glory
In Jeremiah: “Let not the wise man glory in his wisdom, neither let the strong man glory in his strength, nor let the rich man glory in his riches; but let him that glories glory in this, that he understands and knows that I am the Lord, who do mercy, and judgment, and righteousness upon the earth, because in them is my pleasure, says the Lord.” Of the same thing in the fifty-fourth Psalm: “In the Lord have I hoped; I will not fear what man can do unto me.” Also in the same place: “To none but God alone is my soul subjected.” Also in the cxviith Psalm: “I will not fear what man can do unto me; the Lord is my helper.” Also in the same place: “It is good to trust in the Lord rather than to trust in man; it is good to hope in the Lord rather than to hope in princes.” Of this same thing in Daniel: “But Shadrach, Meshach, and Abednego answered and said to king Nebuchadnezzar, O king, there is no need to answer you concerning this word.
For God, whom we serve, is able to deliver us from the furnace of burning fire; and He will deliver us from your hand, O king. And if not, be it known unto you that we serve not your gods, and we adore not the golden image which you have set up.” Likewise in Jeremiah: “Cursed is the man who has hope in man; and blessed is the man who trusts in the Lord, and his hope shall be in God.” Concerning this same thing in Deuteronomy: “You shall worship the Lord your God, and Him only shall you serve.” Of this same thing to the Romans: “And they worshipped and served the creature, forsaking the Creator. Wherefore also God gave them up to ignominious passions.” Of this thing also in John: “Greater is He who is in you than he who is in this world.”
Source: The Treatises of Cyprian (New Advent)