Woof! Woof!

From Michael F., this Spurgeon gem:

Faithful preachers are among God’s best gifts. Cherish them, and be obedient to their admonitions. I have known persons become offended when a minister is “too personal;” but wise men always prize a ministry in proportion as it is personal to themselves. He who never tells me of my faults, nor makes me feel uneasy, is not likely to be the means of good to my soul.

What is the use of a dog that never barks?