The more challenging the obstacles in life, the greater the satisfaction in overcoming them.
Murad S. ShahOne of the hardest expressions of self-assertiveness is challenging your limiting beliefs.
Nathaniel BrandenI've just been reading about cycling. Yeah, I'm not that great at it but I like the challenge of it.
Joey SantiagoIt's lack of faith that makes people afraid of meeting challenges, and I believed in myself.
Muhammad Ali