here @ Bible Gateway) is a passage that stops me just about every time I read it. Consider it for a minute.
What strikes you about that passage? For me, it reminds me that if I am interested in knowing the Lord better, I am completely dependent on His graciously granting that knowledge to me. I cannot in any way, shape, or form attain more knowledge of Him unless He reveals it to me.
That reality, that notion, is not just in Exodus 33:13 (here @ Bible Gateway), no, it permeates one of the passages I listed above, Psalm 119 (here @ Bible Gateway). Read through Psalm 119 (here @ Bible Gateway), note the number of times that David asks the Lord to teach him, or declares his dependence on the Lord to know Him and, or to learn of or obey Him.
As I have mentioned before, it has changed my perspective and the way that I pray.
By the way the other places I have written about Exodus 33:13 (here @ Bible Gateway) are here and here.