As to the highlighted above, concerning the Trinity, repentance. The only thing I think a new believer should be able to articulate is that they are lost in sins, and trust only in Christ alone to save them, that they are doing this shows forth belief, and shows repentance, and that they are now a believer. I don't believe the prayer some pray with them is the clincher, nor is baptism.
If a person tells me they've believed, and have been saved, I won't argue them out of it, or doubt them. At times though we can tell whether one truly understands, and that is OK too. Such a person will need further help. The bottom line is this person hasn't believed yet, so it's not like we've taken this person who doesn't understand as a "believer" aside, we've taken an "unbeliever" aside to preach them the Gospel.
The fact that a person has heard the Gospel and wants to be saved, believes Christ saved them, to me is enough evidence of the person being saved in most cases, and evidence of the working of the Spirit also.
As time goes by these need to be discipled, instructed in the Scriptures and in the faith. But the sad thing here is that many persons just are not properly instructed in the Scriptures and hold to a lone ranger type of proof-text theology filled with error.
I do appreciate the wanting to know if ones profession is genuine though. We all want this, which is a desire to really want another saved.
We should keep in mind that there are many that cannot articulate theological truths, and that some are just not equipped with the faculties to retain these things, so we remember by these things that the only thing that saves is Christ.
I've known many persons with not a whole lot of theology, but their faith in Christ alone saving them was rock solid. This is all anyone needs, although you, others, myself do not like to remain theologically deficient, but instead love to explore doctrinal truths. I believe such a drive and desire to know more things concerning theology and God also comes from the Lord, yet none of this adds to nor diminishes from being saved.
- Peace