By belief in what Jesus accomplished – not lip service.

This is THE GOSPEL – 1 Corinthians 15:1-4
15 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand;
2 By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
4 And that he was buried, and that he rose again the third day according to the scriptures:

Romans 3:25
25 Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;

SALVATION IS NOT ONLY ASKING JESUS IN ONE’S HEART, OR EVEN ADMITTING SIN. BUT RATHER BY BELIEVING IN WHAT JESUS ACHIEVED FOR US BY HIS DEATH AND RESURRECTION IN FAITH.