Have you submitted to ONE Lord?
1.1 He is the one who defines your Christianity or your Christiam faith.
1.2 He is the one you obey above everything else, or anyone else, no matter how difficult or demanding.
1.3 We are to view ourselves as doulos/slaves.
Have you embraced the ONE faith?
2.1 Faith in Christ
2.2 Faithfulness to all of God’s Law
Have you entered into that (saving faith) through ONE baptism?