He shutteth his eyes to devise, etc. - He meditates deeply upon ways and means to commit sin. He shuts his eyes that he may shut out all other ideas, that his whole soul may be in this.
The four verses speak of the same thing, and the well-known opprobrious name, the “man of Belial,” stands at the head as stigmatizing the man who delights in causing the mischief of which they treat.
Diggeth up evil - i. e., Digs an evil pit for others to fall into. Compare Psalm 7:15.
Proverbs 16:30
The physiognomy of the man of Belial, the half-closed eyes that never look you straight in the face, the restlessness or cunning of which biting the lips is the surest indication. Compare Proverbs 6:13.