This statement is either intended to by funny, or it shows a complete lack of understanding of what grace and mercy are.so when do we get this grace and mercy ? and what is Grace what is mercy and if water baptism saves us.. then we dont need grace and mercy
Mercy, simply stated, is not giving a punishment that is deserved.
Grace is giving a benefit that is undeserved.
There is nothing in either of these that precludes conditions placed on them by the giver. For instance, in the courts in America, it is frequently the case the "first offenders" will be shown mercy "as long as they do not repeat the offense". If they repeat the offense, then they receive the punishment for the second crime as well as a reinstated punishment for the first crime. So the mercy is conditional upon future good behavior.
Similarly, in probate court, it is frequent that a will contains conditions that must be met to receive the inheritance specified in the will. Frequently, if you are not present at the reading of the will, you forfeit the benefit you would have received. Does being present "earn" the inheritance? No, but it does qualify you to receive it. In the book, "The Ultimate Gift" (I highly recommend it if you have never read it), the actions taken by the young man don't "earn" the inheritance that his great uncle left him (if he fulfilled all the requirements laid out in the video will), but they did help him grow into the man who was able to appreciate the inheritance he ultimately would receive.
The same holds true for grace in Christ. God put conditions upon our reception of grace. Believe in Christ. Confess His Name verbally and publicly. Repent of our sins, thus living by His commandments for the rest of our life. And being immersed (in water) into Christ for the remission of our sins, and to be added to the Body of Christ.
Without the sacrifice of Christ on the Cross, immersion would be meaningless. There would be no mercy for sinners. All would be equally condemned. But because of His death, we have the opportunity to be forgiven.
I have already enumerated the passages that command these steps. Each of them clearly states that these actions lead to salvation. There is no ambiguity in any of those passages that leaves any room for misinterpretation unless a person willfully chooses to twist them. "He who believes and is immersed will be saved." Too easy to understand. "Repent and be immersed for the forgiveness of your sins." Again, too easy. "Or do you not know that as many of us as were immersed into Christ Jesus were immersed into His death? Therefore we were buried with Him through immersion into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life." If you have not been immersed into His death, have you been united with it? And if you have not been united with His death, how can you expect to be united with His resurrection? These are too easy to understand, and required great difficulty to twist into "faith only".