Matthew 6:24
"No one can serve two masters. He will either hate one
          and love the other, or be devoted to one and despise
          the other. You cannot serve God and mammon."
James 4:4
Adulterers! Do you not know that to be a lover of the
world means enmity with God? Therefore, whoever
wants to be a lover of the world makes himself an
enemy of God.