The song is quoting proverbs. In the Bible, wisdom is personified as a woman on a hill, calling the simple in to eat with her, while "folly" sits at her doorway calling the simple in, stating "Stolen water is sweet; food eaten in secret is delicious." (NIV) The lyrics then refer to wisdom as "my true love" and describe her as warning against the lies of folly, which are poison. The song is about the struggle between wisdom and folly; recalling the difficulty of being drawn in by lies, as they sound so appealing compared to true wisdom. It then expresses the regret of falling for the lies. Both are there, it's just a matter of which one you choose to follow.
The song is quoting proverbs. In the Bible, wisdom is personified as a woman on a hill, calling the simple in to eat with her, while "folly" sits at her doorway calling the simple in, stating "Stolen water is sweet; food eaten in secret is delicious." (NIV) The lyrics then refer to wisdom as "my true love" and describe her as warning against the lies of folly, which are poison. The song is about the struggle between wisdom and folly; recalling the difficulty of being drawn in by lies, as they sound so appealing compared to true wisdom. It then expresses the regret of falling for the lies. Both are there, it's just a matter of which one you choose to follow.