Here are many Bible verses about understanding.

The unfolding of your words gives light; it imparts understanding to the simple.- Psalm 119:130

Whoever is slow to anger has great understanding, but he who has a hasty temper exalts folly.- Psalm 14:29

Making your ear attentive to wisdom and inclining your heart to understanding; yes, if you call out for insight and raise your voice for understanding, if you seek it like silver and search for it as for hidden treasures, then you will understand the fear of the Lord and find the knowledge of God.- Proverbs 2:2-5

Whoever restrains his words has knowledge, and he who has a cool spirit is a man of understanding.- Proverbs 17:27

Trust in the Lord with all your heart, and do not lean on your own understanding.- Proverbs 3:5

The beginning of wisdom is this: Get wisdom, and whatever you get, get insight.- Proverbs 4:7

Think over what I say, for the Lord will give you understanding in everything.- 2 Timothy 2:7

And he said to man, ‘Behold, the fear of the Lord, that is wisdom, and to turn away from evil is understanding.’”- Job 28:28

Now we have received not the spirit of the world, but the Spirit who is from God, that we might understand the things freely given us by God.- 1 Corinthians 2:12

Give me understanding, that I may keep your law and observe it with my whole heart.- Psalm 119: 34

The fear of the Lord is the beginning of wisdom; all those who practice it have a good understanding. His praise endures forever!- Psalm 111:10

Trust in the Lord with all your heart, and do not lean on your own understanding. In all your ways acknowledge him, and he will make straight your paths.- Proverbs 3:5-6

If any of you lacks wisdom, let him ask God, who gives generously to all without reproach, and it will be given him.- James 1:5

But the wisdom from above is first pure, then peaceable, gentle, open to reason, full of mercy and good fruits, impartial and sincere.- James 3:17

The fear of the Lord is the beginning of wisdom, and the knowledge of the Holy One is insight.- Proverbs 9:10

For the Lord gives wisdom; from his mouth come knowledge and understanding;- Proverbs 2:6

But grow in the grace and knowledge of our Lord and Savior Jesus Christ. To him be the glory both now and to the day of eternity. Amen.- 2 Peter 3:18

Great is our Lord, and abundant in power; his understanding is beyond measure.- Psalm 147:5

For the protection of wisdom is like the protection of money, and the advantage of knowledge is that wisdom preserves the life of him who has it.- Ecclesiastes 7:12

How much better to get wisdom than gold! To get understanding is to be chosen rather than silver.- Proverbs 16:16

For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.- Romans 1:20

But the Helper, the Holy Spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you.- John 14:26

And we know that the Son of God has come and has given us understanding, so that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life.- 1 John 5:20