The Catechism in Questions & Answers

238. Are there limitations to human reason?

Yes. In its finiteness, human reason is incapable of grasping God in His endlessness. God’s nature and actions far surpass all human reason (cf. Philippians 4: 7). As a result, reason cannot be the measure of all things.

“And the peace of God, which surpasses all understanding, will guard your hearts and minds through Christ Jesus.”
Philippians 4: 7