Believing in Christ is not just intellectually agreeing that He is Lord and Savior. In other words, the effect of Jesus' blood, by the testimony of the Holy Spirit, is present during baptism to cleanse the sin of the person being baptized. The baptisms performed in the True Jesus Church, during which many have witnessed blood in the water, confirm John's explanation. The way a person is baptized carries great spiritual significance. We bow our heads in baptism in the likeness of His death, to signify dying with Christ.
Full immersion signifies the complete burial of the old self.
The baptism of salvation has the spiritual power to cleanse sins. Water baptism is thus different from the traditional ablution of the Jews or proselyte baptism. It is not a mere ritual. All true believers must believe in the same Lord, hold the same faith, and receive the same baptism. It is important to know what the Bible says about how one should be baptized.