8 Bible Verses about Underestimation

Then you answered and said to me, "We have sinned against the LORD, we will go up and fight, according to all that the LORD our God commanded us." Every man of you put on his weapons of war, and presumed to go up into the hill country.

They returned to Joshua, and said to him, "Do not let all the people go up; but let about two or three thousand men go up and strike Ai. Do not make all the people to toil there, for there are only a few of them."

Now therefore, our God, the great, the mighty, and the awesome God, who keeps covenant and loving kindness, do not let all the travail seem little before you, that has come on us, on our kings, on our leaders, and on our priests, and on our prophets, and on our fathers, and on all your people, since the time of the kings of Assyria to this day.

For the backsliding of the simple will kill them. The careless ease of fools will destroy them.

and you have forgotten the exhortation which reasons with you as with children, "My son, do not take lightly the discipline of the Lord, nor lose heart when you are reproved by him;

And they were offended by him. But Jesus said to them, "A prophet is not without honor, except in his own country, and in his own house."

And Nathanael said to him, "Can any good thing come out of Nazareth?" Philip said to him, "Come and see."

Then you answered and said to me, "We have sinned against the LORD, we will go up and fight, according to all that the LORD our God commanded us." Every man of you put on his weapons of war, and presumed to go up into the hill country. The LORD said to me, "Tell them, 'Do not go up, neither fight; for I am not among you; lest you be struck before your enemies.'" So I spoke to you, and you did not listen; but you rebelled against the commandment of the LORD, and were presumptuous, and went up into the hill country.read more.
The Amorites, who lived in that hill country, came out against you, and chased you, as bees do, and beat you down in Seir, even to Hormah.