At any time you can decide to alter the course of your life; it’s your choice. No one can ever take that away from you. You can do what you want to do and be who you want to be.
Nature is constantly at work around you. You have the power to choose which impulse you follow.
While your character is formed by your circumstances, your desires can shape those circumstances. The one thing over which you have absolute control are your own attitudes and activities. It is this that puts you in a position to control your own destiny.
Your greatest power is the power to choose.