Isaiah 55:8,9 NLT - "My thoughts are nothing like your thoughts," says the Lord. "And My ways are far beyond anything you could imagine. For just as the heavens are higher than the earth, so My ways are higher than your ways and My thoughts higher than your thoughts."
Romans 11:33-36 NLT - "Oh, how great are God's riches and wisdom and knowledge! How impossible it is for us to understand His decisions and His ways! For who can know the Lord's thoughts? Who knows enough to give Him advice? And who has given Him so much that He needs to pay it back? For everything comes from Him and exists by His power and is intended for His glory. All glory to Him forever! Amen.
Isaiah 40:13 NLT - "Who is able to advise the Spirit of the Lord? Who knows enough to give Him advice or teach Him?"
Isaiah 40:28 NLT - "Have you never heard? Have you never understood? The Lord is the everlasting God, the Creator of all the earth. He never grows weak or weary. No one can measure the depths of His understanding."
Now, the Lord knows we can't understand Him by mere human effort. BUT, He has given us what we need to learn His ways and appreciate His understanding:
1 Corinthians 2:13-16 NLT - "When we tell you these things, we do not use words that come from human wisdom. Instead, we speak words given to us by the Spirit, using the Spirit's words to explain spiritual truths. But people who aren't spiritual can't receive these truths from God's Spirit. It all sounds foolish to them and they can't understand it, for only those who are spiritual can understand what the Spirit means. Those who are spiritual can evaluate all things, but they themselves cannot be evaluated by others. For who can know the Lord's thoughts? Who knows enough to teach Him? But we understand these things, for we have the mind of Christ."