The bible has a fair amount to say about "knowing Him" and the perils of not...
Allot of people debate allot of things concerning the scriptures, some are more doctrinally focused, others eschatologically so, while for others theological issues take precedence, or even your church or service in your local area. For others still it's fixing things and people that seems to get their attention.
Allot of people know "about Him" and argue allot of what they think they know,...
Some have even met Him and spent time in His presence...
But knowing Him (the one true and living God) is the basis of all true Christian faith.
So what does "knowing Him" mean to you?
