Many things about God are beyond our comprehension. As humans we don't like this. We like a little bitty god that can fit inside our itty bitty logical box and be understood by our tiny little human brains. Take the hypostatic union of Jesus for example. Jesus, 100% God, 100% man. The God-Man. Two 100%??? Doesn't make sense in our brains. Maybe that is because He is GOD and we are humans. Maybe that's because God is really BIG and we are really small. 

Maybe that's why Romans 11:33 says "O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!" and Psalm 50:21 says "These things have you done, and I kept silence; you thought that I was altogether such a one as yourself:"

Praise God that He has revealed to us truth about Himself and the gospel, how to be saved, that we can understand. Verses so clear are given to us, like John 3:16 "For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life." There are many single and complex truths in God's Word that we are to study and learn and understand. But there are some things about God, that as we read the Bible we will be unable to fully comprehend. Things like the Trinity, the Hypostatic Union, and the relationship between's God's sovereignty and decrees and our human responsibility and free agency. In these moments, don't reject it because you can't understand it. Instead, take a step back and stand in awe of God. Take a moment to think on His words in Psalm 46:10: "Be still, and know that I am God:"

Please listen to Shai Linne's song "The Hypostatic Union"

https://www.youtube.com/watch?v=eCBC5Wn5a0Y