(Exodus 3:1:) "Now Moses was tending the flock." This is what Scripture says (Psalms 103:7): "He made His ways known to Moses, etc." Why did He make His ways known to Moses? Because Moses knew all the ways of the Holy One, blessed be He, and no other person knew them. It is written (Exodus 33:13): "And now, etc., make Your ways known to me, please." The Holy One, blessed be He, said to him: It is upon His ways that you seek to stand? By your life, I shall make them known to you—(as it says,) "He made His ways known to Moses."
Moses Alone Knew the Ways of the Holy One
Midrash Tanchuma Buber, Shemot 9:1
ומשה היה רעה (שמות ג א). זש"ה יודיע דרכיו למשה וגו' (תהלים קג ז), למה יודיע דרכיו למשה, שכל דרכיו של הקב"ה ידע משה, ואדם אחר לא ידע, כתיב ועתה [וגו'] הודעני נא את דרכיך (שמות לג יג), אמר לו הקב"ה על דרכיו אתה מבקש לעמוד, חייך שאני מודיעך, יודיע דרכיו למשה.