Not just sheep.

 Matthew 10:16 (New International Version)

   ¹⁶ “I am sending you out like sheep among wolves. Therefore be as shrewd as snakes and as innocent as doves."
 

Proverbs 2:1-11 (New International Version)

 Proverbs 2

Moral Benefits of Wisdom

 ¹ My son, if you accept my words
   and store up my commands within you,
² turning your ear to wisdom
   and applying your heart to understanding—
³ indeed, if you call out for insight
   and cry aloud for understanding,
⁴ and if you look for it as for silver
   and search for it as for hidden treasure,
⁵ then you will understand the fear of the LORD
   and find the knowledge of God.
⁶ For the LORD gives wisdom;
   from his mouth come knowledge and understanding.
⁷ He holds success in store for the upright,
   he is a shield to those whose walk is blameless,
⁸ for he guards the course of the just
   and protects the way of his faithful ones.

 ⁹ Then you will understand what is right and just
   and fair—every good path.
¹⁰ For wisdom will enter your heart,
   and knowledge will be pleasant to your soul.
¹¹ Discretion will protect you,
   and understanding will guard you. 

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Wisdom

1.  the ability or result of an ability to think and act utilizing knowledge, experience, understanding, common sense, and insight

Understanding

1.	the ability to learn, judge, make decisions, etc; intelligence or sense
2.	personal opinion or interpretation of a subject: my understanding of your predicament

 Knowledge

 1.  the facts, feelings or experiences known by a person or group of people

 Insight

1.	the ability to perceive clearly or deeply; penetration
2.	a penetrating and often sudden understanding, as of a complex situation or problem

Discretion

1.	the quality of behaving or speaking in such a way as to avoid social embarrassment or distress
2.	freedom or authority to make judgments and to act as one sees fit