What does it mean to be a Christian?

Romans 2:21-24
New King James Version (NKJV)

21 You, therefore, who teach another, do you not teach yourself? You who preach that a man should not steal, do you steal? 22 You who say, “Do not commit adultery,” do you commit adultery? You who abhor idols, do you rob temples? 23 You who make your boast in the law, do you dishonor God through breaking the law? 24 For “the name of God is blasphemed among the Gentiles because of you,”[a] as it is written.

Footnotes:
a.Romans 2:24 Isaiah 52:5; Ezekiel 36:22



Isaiah 52:5
New King James Version (NKJV)

5 Now therefore, what have I here,” says the Lord,
“That My people are taken away for nothing?
Those who rule over them
Make them wail,”[a] says the Lord,
“And My name is blasphemed continually every day.

Footnotes:
a.Isaiah 52:5 Dead Sea Scrolls read Mock; Septuagint reads Marvel and wail; Targum reads Boast themselves; Vulgate reads Treat them unjustly.

Ezekiel 36:22
New King James Version (NKJV)

22 “Therefore say to the house of Israel, ‘Thus says the Lord God: “I do not do this for your sake, O house of Israel, but for My holy name’s sake, which you have profaned among the nations wherever you went.