You are not to be like that. Instead, the greatest among you should be like the youngest, and the one who rules like the one who serves. For who is greater, the one who is at the table or the one who serves? Is it not the one who is at the table? But I am among you as one who serves. (Luke 22: 26-27)
Watch out! Be on your guard against all kinds of greed; a man’s life does not consist in the abundance of his possessions.” (Luke 12: 15)
For whoever wants to save his life will lose it, but whoever loses his life for me will save it. What good is it for a man to gain the whole world, and yet lose or forfeit his very self? (Luke 9: 24-25)