Did you realize that your answer directly contradicts the Bible?

Colossians 2:12-13 says

"in baptism you were also raised up with Christ"

You answered:

"Baptism is merely an outward sign of inward grace"

Please read the Bible Text again then confirm your answer:

Colossians 2:12-13

"having been buried with Him in baptism, in which you were also raised up with Him through faith in the working of God, who raised Him from the dead. And when you were dead in your transgressions and the uncircumcision of your flesh, He made you alive together with Him, having forgiven us all our sins"

Baptism is merely an outward sign of inward grace

Raised up (born again) through baptism