Everybody loves a motivational quote! All it takes is a few minutes scrolling through twitter in the morning to be inundated with posts from people who've never played sports or trained hard in their lives telling you things like "winning isn't everything, it's the only thing."
I'm not criticising this though; I love it! We should embrace the age where anybody can be a motivator and brighten up your day with a positive message about how to get better and improve yourself. If it takes a tweet from somebody to motivate you, but it works, then it's done the job and everybody is better off as a result.
So what's my message? Use whatever tools you need to motivate yourself to improve, but set yourself on the right path to making yourself a better person. Improve your diet, improve your training, improve your relationships with people that matter to you. If it takes a motivational quote to do these things, then please people, keep posting!!