If our knowledge of God doesn't grow us in faith and obedience to His greatest commandments, to love the Lord firstly, and secondarily, our neighbor, then our knowledge is not spiritually beneficial (Matthew 22:37-39). In fact, such knowledge can even be detrimental, for it is written "knowledge puffs up, but love builds up" (1 Corinthians 8:1). The more we know, the more that will be expected from us. For if we don't practice what we have learned, then we are guilty of the sin of omission (James 4:17). But truly, "agape" love will always motivate us in the worship (prioritize) of God and humble service of others (especially our family), ever mindful of our neighbors' needs and not just our own (Philippians 2:2–4). Like Jesus, who humbled Himself so greatly, that He willingly endured the pain and shame of the cross for our offenses, though He never sinned!
On the contrary, mere head knowledge of His word too often leads to a puffed up mind, self-righteousness, and self-seeking behavior. This is much more common in the world of academia. For a lofty mind will always produce an infected and defiled heart, but lowliness of mind before God will keep us grounded, tender toward others and receptive to Him. Therefore, as we seek to grow in the knowledge of God, as we are called to, may we be prayerful and ever aware of our fleshly weakness; taking to heart what is written in holy Scripture.
"If I have the gift of prophecy and can fathom all mysteries and all knowledge, and if I have absolute faith so as to move mountains, but have not love, I am nothing." (1 Corinthians 13:2)