NIFLA!

What is the pnimiyus of man, the deepest hidden part?

Take the word אדם, the "inside" of the אל"ף is לפ, the inside of the דל"ת is לת and the inside of the מ"ם is מ, you emerge with the word ....

מתפלל

That is the essence of man - a davener!!

[Ben Ish Chai - heard from Rav Moshe Schapiro]