A message arrived from a student asking about getting "cocky" with your swing when things are going well. He asks:
"You started to caution me not to get cocky now that I am hitting the ball solidly. You never finished your thoughts on that and I am interested in what you have to say"
The purpose of that statement means, do not get careless with your swing when things are going well. Do not neglect your setup routine. Practice the same method each golf shot, the same walk in, the same grip, the same practice swings, and last but certainly not least, proper Alignment!
If you get careless with your routine, your golf game will suffer - a problem that happens to everyone, even Tour players. How often have you seen someone doing well early in a tournament to cave toward the end? Overconfidence and carelessness cause us to start to neglect our setup routine. With a lot of people, once you start sliding downhill, it can be a huge mental challenge to correct it mid-play.