Here are some quotes and citations that Elon Musk have shared so far, based on his knowledge experience and vision.
"If things are not failing, you are not innovating enough."
“You should take the approach that you’re wrong. Your goal is to be less wrong.”
Consider failure as an ally rather than an enemy, greet it with a positive mindset, and you will reap the benefits in your endeavors.
true success comes to those who are ready to seize new opportunities and become agents of change.
"People should pursue what they're passionate about. That will make them happier than pretty much anything else."
From E-book "Elon Musk - The life, lessons & Rules for success"