1 Peter 2:25

"For you were like sheep going astray, but now you have returned to the Shepherd and Overseer of your souls." NIV translation

Without proper guidance, sheep will just wander off and perish. It is not that they are that stupid, it is simply that they focus on what is directly in front of them and miss the larger picture.

But, when properly guided, they can be very productive and the same things are true of man. 

Left to our own, we can see the effects of sin all around us and the death that goes with it but, when properly guided by God through the Holy Spirit, we all can be productive for the kingdom. If you are ready to answer the call to be holy, you can start by pressing the reset button on your life and coming back to the Shepherd.