But we command you, brethren, in the name of our Lord Jesus Christ, that you withdraw from every brother who walks disorderly and not according to the tradition which he received from us. Two important traditions that Jesus expects all Christians to fulfil and observe respectively are water baptism and the Lord's supper.
Water baptism is the immersion in water.
It is done as a public declaration of our faith. Water baptism is a physical demonstration of a spiritual change that has occurred in your life. Being immersed in the water represents the death and burial of your old life. Coming out of the water is a picture of your new life in Jesus. Water baptism not only shows our obedience to Jesus but also exhibits our deliverance from the power of darkness.