“Christ lives in me and I will not be ashamed to share His words” is the kind of word should a Christian say and live in their daily life.
Live for Him in public not in private.
Romans 1:16-18 KJV
For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.
For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness;