We must all realize our depravity and need of redemption. We are sinful by nature and must be redeemed through the gift of salvation offered to us by God through Christ's sacrifice.
23 for all have sinned and fall short of the glory of God. - Romans 3:23
Believe in your heart by putting your faith in Christ's work and God's love for you, that you are saved.
8 For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— 9 not by works, so that no one can boast. - Ephesians 2:8-9
Confess with your mouth that Jesus is Lord and you shall be saved.
if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. - Romans 10:9