We never arrive.  In all of our acquiring knowledge we must remember to get understanding.  And what is understanding?  True understanding is accepting that truth is a journey, not a destination.
 
Just because Jesus promised that the Holy Spirit would guide us into ALL TRUTH doesn't necessarily mean that the truth will come all at once or from one culture, cult, religion or religious figure.  Truth is a proceeding word or a continual flow that emits to and through all of creation.  Because we are both flesh and spirit we are temporarily, yet not permanently, unable to see all of God's Spirit and Truth at once or even clearly.
 
I Corinthians 13:12 says, Now we see but a poor reflection as in a mirror...  Claiming to know something that we can never completely know keeps us from a deeper knowing.  We see.  However, we do not yet see clearly.  Questions are like Windex for the mirror of our soul.  As we ask questions, we wipe away a little more of the debris that blurs our vision, and we remove the obstacles that keep us from seeing into the mirror correctly.
 
Once we lose our perceptions of knowing, the mirror shows us something most unexpected... it shows us God!  As we humble ourselves and ask, we experience the exaltation of knowing.