Scripture provides three reasons why every believer should be baptized.
I. DEVOTION: Baptism openly identifies one as a follower of Jesus Christ.
The last words of Jesus before He ascended into heaven according to Matthew 28:19, were "Go therefore and make disciples of all the nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit."
II. DUTY: Baptism openly obeys the command of Christ.
It's important to realize that while baptism is a public expression of Christian devotion, it is also an act of Christian duty. Baptism is a practice ordained by Christ Himself. Look again at Jesus' Great Commission to the church: "Go therefore and make disciples of all the nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit, teaching them to observe all the things that I have commanded you; and lo, I am with you always even to the end of the age." (Matt. 28:19-20). Both in the original language and in our modern translation, we see that baptism was commanded by Jesus for those who would become His disciples.
III. DOCTRINE: Baptism openly expresses your faith in many biblical truths.
To submit to baptism is to publicly profess that you believe what baptism represents. Baptism represents three primary doctrines, all of which are vital to the life and testimony of the Christian.
Excerpted from the booklet "Why Be Baptized" by Matthew Fletcher, 2004
This booklet is available in it's entirety by requesting it on the Contact Page
"Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age."
Matthew 28:19-20 ESV
We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life.
Romans 6:4 ESV