Just as the "fear of the Lord is the beginning of wisdom," it is true that we become wiser as we learn that we cannot be wise enough to fathom God.
"Great" is a strong, but inadequate adjective for God. All superlatives in our language dissolve into the glory of His presence.
I cannot know all there is to know of Him and knowledge of lack of knowledge informs me that He is God and I am not.
I may not be able to fully know Him, but I can know Him because I am known of Him and He draws me closer daily.
"Great is the LORD, and greatly to be praised, and his greatness is unsearchable." (Psalm 145:3 ESV)
Evocation of elocution with none to listen.
Expectation of invocation with One to hear
And none to fear.
Oh Fearful One who sees and knows and hears,
My ears, my eyes, my heartfelt cries
Are lifted beyond the skies.
I hear and see and behold the beauty of the earth
And what earth hath built upon earth.
Oh Fear who erases fear and eradicates dread,
My head, my heart, my all I bring
And with all I have I sing though none may listen,
Thou dost listen.
I have rested for the moment with Thee
And I am free.