Psalm 73:21-22

When my heart was grieved and my spirit embittered, I was senseless and ignorant; I was a brute beast before you.

I was senseless and ignorant 
Psalm 49:10  For all can see that the wise die, that the foolish and the senseless also perish, leaving their wealth to others.
Psalm 92:6-7  Senseless people do not know, fools do not understand, that though the wicked spring up like grass and all evildoers flourish, they will be destroyed forever.
Psalm 94:8  Take notice, you senseless ones among the people; you fools, when will you become wise?

I was a brute beast before you 
Psalm 49:12  People, despite their wealth, do not endure; they are like the beasts that perish.
Psalm 49:20  People who have wealth but lack understanding are like the beasts that perish.
Ecclesiastes 3:18-19  I also said to myself, "As for humans, God tests them so that they may see that they are like the animals. Surely the fate of human beings is like that of the animals; the same fate awaits them both: As one dies so dies the other. All have the same breath; humans have no advantage over animals. Everything is meaningless."
Ecclesiastes 9:12  Moreover, no one knows when their hour will come: As fish are caught in a cruel net, or birds taken up in a snare, so people are trapped by evil times that fall unexpectedly upon them.
Job 18:3  "Why are we regarded as cattle and considered stupid in your (Job's) sight?"

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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