To become a member of the Christian Church, must you be baptized with water?
What constitutes a proper baptism?
If it is NOT required, what is, and what does baptism do or what is the meaning of it?
Yes, Christ commissioned His Church to make disciples, baptizing them in the name of the Father, Son, and the Holy Spirit (Matthew 28:19). By which we have been born again into God's kingdom (John 3:3-5, Titus 3:5), whereby Christ has cleansed us by the washing of water with the word (Ephesians 5:26), have our sins forgiven and receive the gift of the Spirit (Acts of the Apostles 2:38), have been joined to Christ's death, burial, and resurrection (Romans 6:3-4, Colossians 2:12-13), having been clothed with Jesus Christ Himself (Galatians 3:27).
Proper Baptism is baptism done by Christ's name and authority, as He Himself has instituted this Sacrament for His Church; and the proper and Christian way of baptizing is in the three-fold name of the Holy Trinity: "Father, Son, and Holy Spirit". Baptism is Baptism because it is "water with the word" (see again Ephesians 5:26). The word is here by the command of Christ to baptize (see again Matthew 28:19), and the promises attached to Baptism, namely forgiveness of sins, and new birth from God, by which we are adopted as sons and daughters, and enter God's kingdom. For the Apostle writes, "
He has delivered us from the domain of darkness and transferred us to the kingdom of his beloved Son, in whom we have redemption, the forgiveness of sins." (Colossians 1:13-14)
For we are born from above, not by the will of our sinful human flesh, but by the will and power of God--His grace (John 1:13). And so God works His grace and power of salvation, creating in us and working in us faith, through which we have been saved and justified (Ephesians 2:8, Romans 1:16-17, Romans 5:1). And He does so by the Means of Word and Sacrament (e.g. Romans 10:17).
Thus the baptized can stand confidently before God, in grace, as a justified and forgiven sinner; justified by God's grace alone, having nothing in and of ourselves by which to boast (see again Ephesians 2:8-9).
-CryptoLutheran