Not a problem for one who believes he or she is correct, or his denomination is correct, with no possibility of being wrong, I suppose. 
I am curious:  If a seeker approached you looking for what the gospel is, would you give him your version only, or would you suggest that he compare the beliefs of all the denominations as he reads the Bible and other sources?
		
		
	 
Bible study, yielding to the Holy Spirit, receiving Jesus as Savior, "learning," are not intellectual endeavors. 
1. Christianity is not a religion. There is NO organized "system" of beliefs. Salvation is by God's Grace through Faith. Even the Faith to believe (Romans 10:8-13) originates with Him, comes through Him, and is by Him. We don't "generate" it ourselves. Faith is the substance, Faith is the evidence. Share that with your listener(s).
2. 
I will never believe that 
"I" am correct. 
I would never give a seeker 
MY version, or the version of anyone else. 
I  would never suggest that he or she compare Christian "belief systems," as in denominations. 
I would never lean to a specific denomination, or try to "blend" or "merge" two or more.  
I would never look to "other sources," those outside the Bible. I would never quote ANY of the early commenters as a reliable or even suggested reference (Philo, Augustine, et al).  Share that with your listener(s)
There is the 
"I" of the 
 sinful nature, and the 
"I" of the 
 Spiritual Nature.
When 
the Spiritual Nature reads  or speaks or types, It is 
HE who is the source of each of those. 
I  get out of the way, yielding to the 
Holy Spirit. HE is my only source.
Lean not to your 
own understanding; in 
ALL your ways acknowledge 
Him. 
How? Prayer. Prayerful meditation. Bible writers themselves, Genesis through Revelation. Internal Bible cross-references and  supporting scripture, prayerfully discovered and retained; take notes, record notes. Share what God reveals to you. 
God is Good. He will NEVER lead us into paths of unrighteousness, or a war of words.  
:godisgood: