Signs, signs signs, that is all people want, and who wants God? But if you want scripture then I will give it to you.
1John 5:7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
1John 5:7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
Three WHAT?! I don't see persons anywhere. I asked for no inference of indoctrination. You give me the Comma Johanneum like the novice you are. 1 John 5:7b-8a is also considered spurious, since it appears in only 3 legitimate manuscripts. Either way, one (heis) is a cardinal number. This isn't a Trinity proof-text; it's a Oneness proof-text. I'm not Oneness, either, but you'd be better off considering it spurious. Next...
God is not three "persons". Provide scripture that God is three persons. In fact, present a thorough exegetic apology for Trinity, since you're so pious in the wisdom of your many years.
Are you sure you wanna bite this off?