We can all point at others who we think serve things of this world. Yet if I search my self there are definitely areas that remain my master. Not all of the time but certainly self interest rather than being a humble servant. A good place to start each day or to end each day would be with Psalms 139 23-24 “Search me, O God, and know my heart!
Try me and know my thoughts!
And see if there be any grievous way in me,
and lead me in the way everlasting!”Matthew 6:23
If then the light in you is darkness, how great is the darkness!
“No one can serve two masters, for either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve God and money.
Romans 6:16
Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness
James 4:4
You adulterous people! Do you not know that friendship with the world is enmity with God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God
Proverbs 28:26
Whoever trusts in his own mind is a fool,
but he who walks in wisdom will be delivered
1 Corinthians 3:18
Let no one deceive himself. If anyone among you thinks that he is wise in this age, let him become a fool that he may become wise. For the wisdom of this world is folly with God