Is baptism essential unto salvation?

[Adino]

Anyone,

It is a matter of historical fact that that blood of Christ was 'applied' at Calvary PRIOR to Christ's resurrection. If it had not been applied, then Christ would not have been resurrected. The resurrection proves that the shed blood of Christ was effective in removing any sin imputed to Christ. ALL sin imputed to Christ was remitted because of his blood BEFORE he rose again.

Why must WE (at any time) apply the blood which the resurrection proves has already been applied and accepted by God?

Our sin was imputed to Christ and it was removed BEFORE the resurrection, thus, as far as the sin imputed to Christ is concerned, it is a matter of history, proven by the resurrection, that the blood has already been applied in the eyes of God (else Christ would not have been raised).

Do you believe the blood of Christ must be applied twice? Once before the resurrection and then again when we are baptized?

AND...

What is the blood being applied to in baptism?If our sins were historically removed before the resurrection, what is the blood being applied to in baptism?