Sirach 21:11-13

New Revised Standard Version, Anglicised

¹¹ Whoever keeps the law controls his thoughts,
    and the fulfilment of the fear of the Lord is wisdom.
¹² One who is not clever cannot be taught,
    but there is a cleverness that increases bitterness.
¹³ The knowledge of the wise will increase like a flood,
    and their counsel like a life-giving spring.