Here is just a bit of what Heath wrote:
Preaching is not like coaching a football team. A football coach gives his message to his players. He implements his philosophy. He installs his game plans. The player practice in order to develop their skills and flourish in the coaches system. And then comes game day. This is when the coach gets to measure the progress his team is making. You just can't do this in practice. Practice can be deceptive. It has to come on game day. The skill and improvements of his players are measured in statistics and in wins. That's the bottom line.Read the rest of the article here.
Preaching is not like this for one primary reason - the preacher can't count the wins and losses.
I cannot judge by the response of a congregation on Sunday morning whether or not I am a success. The true determination of the preachers success comes in places where the preacher simply cannot be - at dinner tables, in living rooms, in cars, etc.