And how do we KNOW it's a SPIRITUAL BAPTISM and NOT a WATER BAPTISM?
"For in him dwelleth all the fullness of the GOdhead bodily. And ye are complete in him, which is the head of all principality and power: In whom also ye are CIRCUMCISED with the circumcision MADE WITHOUT HANDS, in putting off the body of the sins of the flesh by the circumcision of Christ: BURIED with him in BAPTISM, wherein also ye are RISEN with him through the FAITH OF THE OPERATION OF GOD, who hath raised him from the dead." (Col.2:9-14). This is ALL about the Holy Spirit's work. It is ALL SPIRITUAL. NOT physical. The baptism is no more physical than the circumcision is.
While certainly a very worthy ceremony to adhere to, and one I most strongly encourage, it's obviously not an absolute necessity.
For the same reason Abraham, Moses or the prophets werent baptized. Christ had not died, had not been buried, and had not risen again when they all died.
Note that John was baptizing before the crucifixion.
Cherry picking one or two passages alone is unscriptual.
The scriptures I reference stand alone in there meaning (i.e., no context needed).
By the way, you didnt answer my question. Can you be saved without repenting?
As the scriptures say many times and in many books, Call upon the Lord; profess your faith in Yeshua Messiah; ask forgiveness of your sins; is all that is necessary to be called up at his second coming. Remain in Messiah lest ye join the queue for judgment of your works at the end. :-)