Galatians 3:27, For as any of you as were baptised into Christ have put on Christ.
Nowhere in Paul’s writings on Baptism is it ever suggested that he’s using metaphorical or symbolic language, as the evangelicals erroneously claim, belittling the work of Christ. Not even the Greek suggests this. Nay, in Baptism we are clothed with Christ—He becomes ours and we become His. He clothes us with His righteousness and purity. If this did not happen in Baptism, it would become a mere human tradition and therefore meaningless, and we would be without hope. And since we have put on Christ, our robe also becomes dirty with the grime of sin. As we walk down the streets of life, we jump in puddles of sin and we fall in ditches of trials and tribulation. Thus, it is only natural that Christ wants to cleanse His clothing, which He does through Law and Gospel. He shows us our sin and grime in the mirror, causing us to repent and lean on His Gospel; and He leads us and guides us on the path to holiness, curbing our sin, reminding us of our having been washed in our Baptism.