Tough people do!
I think about this everyone I pick up the iron, a good book, or the Good Book! I cannot stress how important physical, mental and spiritual strength are in our lives! We fight temptations, addictions, depressions, outcomes of bad decisions, distractions from making good decisions, people in our way, people holding us back, haters, lovers, emotions, drama, and the list goes on! I have to remind myself when I wasn't to quit, skip or cheat, "I ain't doing this for nothing!" I have a REAL plan, and REAL goals and a REAL purpose that must be fulfilled, AND SO DO YOU :-)
Get tough, because you don't know what's around the corner!