I'll try to elaborate using examples.. if you wanna get a job, u need to bid for it or probably get interviewed first (now that's a challenge), you want to get a certification in some course, you need to write the certification exams (still a challenge), You wanna have that six-pack, you need to work-out consistently, daily(now that's a massive challenge). and the end product of all these....is that you achieve your goal after you have over-come the challenge. do you get it now??