Hebrews 13:5 Let your conduct be without covetousness; be content with such things as you have. For He Himself has said, “I will never leave you nor forsake you.” [6] So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
Conduct, simply put, is our behavior or demeanor. The Hebrew Christians are instructed not to have their behavior and demeanor influenced by covetousness, which is greed, or the desire to amass things. Even our selfless acts can be influenced by this sin. We may not get material things from good deeds, but we may receive laud from it, which panders to sinful self.