Revelation 3:15

1 Kings 18:21 NIV
Elijah went before the people and said, “How long will you waver between two opinions? If the Lord is God, follow him; but if Baal is God, follow him.” But the people said nothing.

James 1:8 NIV
Such a person is double-minded and unstable in all they do.

Matthew 6:24 NIV
“No one can serve two masters. Either you will hate the one and love the other, or you will be devoted to the one and despise the other. You cannot serve both God and money.

Revelation 2:4 NIV
Yet I hold this against you: You have forsaken the love you had at first.

Romans 12:11 NIV
Never be lacking in zeal, but keep your spiritual fervor, serving the Lord.