Albert Barnes Commentary Isaiah 59:8

"The way of peace they know not; and there is no justice in their goings: they have made them crooked paths; whosoever goeth therein doth not know peace." — Isaiah 59:8 (ASV)

The way of peace they do not know - The phrase ‘way of peace’ may denote either peace of conscience, peace with God, peace among themselves, or peace with their fellow-men. Possibly it may refer to all these, and the sense will be that in their whole lives they were strangers to true contentment and happiness. They found peace from no quarter; whether in relation to God, to their own consciences, to each other, or to their fellow-men, they were involved in continual strife and agitation (see the notes at Isaiah 57:20-21).

And there is no judgment in their goings - Margin, ‘Right.’ The sense is that there was no justice in their dealings. There was no disposition to do right. They were full of selfishness, falsehood, oppression, and cruelty.

They have made them crooked paths - A crooked path is an emblem of dishonesty, fraud, and deceit. A straight path is an emblem of sincerity, truth, honesty, and uprightness (Proverbs 2:15; and the notes at Isaiah 40:4). The idea is that their counsels and plans were perverse and evil. We have a similar expression now when we say of a man that he is ‘straightforward,’ meaning that he is an honest man.