An excellent discussion of what baptism is about, and the wonderful mystery of the Trinity.
“I still have many things to say to you, but you cannot bear them now.13 When tthe Spirit of truth comes, uhe will vguide you into all the truth, for he will not speak on his own authority, but wwhatever he hears he will speak, and he will declare to you the things that are to come.14 He will xglorify me, for he will take what is mine and declare it to you.15 yAll that the Father has is mine; ztherefore I said that he will take what is mine and declare it to you.
http://www.holytrinitychatham.org/sermons/2016/5/22/trinity-and-baptisms