It tells you you are skipping Jesus says "if you love Me keep my commands".
Salvation is life long process, not one time event of confession.
Once a person believes He is given eternal life (Jn.5:24). And the Lord Jesus says that those to whom He has given eternal life "shall never persish (Jn.10:28)."
But these facts are evidently too difficult for you to understand.
According to your ideas those to whom the Lord Jesus gives eternal life can perish.
Do you not know that it is those who "believe God" who are saved and not those who deny His words?:
"For what saith the scripture? Abraham believed God, and it was counted unto him for righteousness" (Ro.4:3).