How do we know that baptism does not convey grace?

In the Reformed view, baptism is considered an ordinance given by Christ, not a sacrament that conveys grace. This means that while baptism is an important act of obedience and signifies a believer's faith, it does not wash away sins or improve one's standing before God. The grace that saves is found solely in the blood of Christ, as emphasized in Revelation 1:5, which states that 'to him that loved us and washed us from our sins in his own blood.' Therefore, understanding baptism as an outward sign of an inward faith helps prevent the misconceptions often propagated by erroneous teachings about its efficacy.