“The harder the conflict, the more glorious the triumph. What we obtain too cheap, we esteem too lightly; it is dearness only that gives everything its value. I love the man that can smile in trouble, that can gather strength from distress and grow.” — Thomas Paine
When I studied Martial Arts, my Sensei told me that the ones who quit are the ones that it comes easy too. The ones who have to struggle or try harder persevere longer and achieve more.
Training for anything is necessary. Enjoying the journey is how to best enjoy the process of overcoming. That is the key to the above saying because life, happiness, freedom and other things we cherish are a journey, not an event.