Frowardness is in his heart, he deviseth mischief continually; he soweth discord.
– Proverbs 6:14
Frowardness is perversity and occupies the mind of the wicked man. All his thoughts are affected by it. To devise is to plan or design. Mischief is evil or adversity to others. So he continually plots and contrives evil to other, whether to gain advantage or simply to work destruction. Discord is strife and contention. This he sows as a man liberally scatters seed in a field. In the perversity of his mind, he would rather people be at odds than in harmony. The implication also is that he sows discord to his own advantage in some way.