Proverbs 11:5

The righteousness of the perfect shall direct his way: but the wicked shall fall by his own wickedness.
– Proverbs 11:5

The word for perfect means unblemished, or whole. It is most used in reference to sacrifices. Here it is used for one possessing righteousness, which is justice, truthfulness, etc. For him, the way is made straight or plain. He is guided and not hindered by supposed ethical dilemmas (Psalm 119:32). It is not so with the wicked. Their way is crooked and not straight (Proverbs 2:15). They have no safe guide but rather are guided by their wickedness and foolish imaginations. The end result for the wicked is being taken by their own devices (Proverbs 1:31-32; 5:22).

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