There is a fine line between envisioning success and daydreaming about it... The former is a motivator and a motor for your journey that you have to go through before you actually achieve your goals. The latter is a potential killer. It will kill your motivation, kill your need to actively pursue your dreams... Daydreaming is dangerous, as it takes you to the final destination, makes you feel like you're already there in your mind, even though you are just at the starting point in reality. It's a show-stopper and deal-breaker.