Courage is essential to growth.
Anything new you want to be or do, will require courage to lean into, because who you have been and what you have experienced is now familiar to you, it is comfortable. It takes little to no courage to continue that known experience.
What does take courage is facing the unknown and moving forward into it; breaking out of old patterns and rutted paths takes heart. You have to put yours into it, if you want to change anything for the better.