Original sentence: The main purpose is to help you to cultivate self-knowledge and self confidence, so that each one of you can learn self-sacrifice and earn self-realisation...  though the valuable lessons of detachment, loving service, fraternity, humility, sincerity, fortitude and fearlessness
Edited sentence: The main purpose is to help you to cultivate self-knowledge and self confidence, so that each one of you can learn self-sacrifice and earn self-realisation...  through the valuable lessons of detachment, loving service, fraternity, humility, sincerity, fortitude and fearlessness