As Solomon warned of adultery, he explained why he issued his warning,
“Lest you ponder her path of life—her ways are unstable; you do not know them” (Proverbs 5:6).
A man would ponder the path of an adulteress, and Solomon warned that her ways are unstable, so much so that we do not know her ways.
Later in verse 21, Solomon gave further insight, “For the ways of man are before the eyes of the LORD, and He ponders all his paths” (Proverbs 5:21).
While we may ponder the life of adultery, God ponders our way.