Yesterday my teacher made the comment that it doesn't matter WHAT is on your stand but HOW you approach what is one the stand that matters.
The point is that it doesn't matter who you study with, what horn you play on, or what books you have. What matters is how you approach practicing and performing. Your mind is your most powerful tool when it comes to making music. I feel that this is worth sharing on a forum where so many of us get caught up with chasing the latest mouthpiece,method book, trumpet, or greatest teacher. Work hard, but work smart and good things will happen to your playing and musicianship.