Proverbs 4:19-21

New Revised Standard Version, Anglicised

¹⁹ The way of the wicked is like deep darkness;
    they do not know what they stumble over.
²⁰ My child, be attentive to my words;
    incline your ear to my sayings.
²¹ Do not let them escape from your sight;
    keep them within your heart.