Who you are tomorrow begins with what you do today.
Whatever you do, do it with purpose. Being focused is not something to be ashamed of. It is something to be proud of. When you know what are you are doing and have a clear vision of where you are going, you will not need to chase opportunities. Opportunities will seek you. Happiness will chase you. And, instead of being a choice, you will be the one choosing.
Constantly stopping to explain oneself may expand into a frustrating burden for the rare individual, so ceasing to do so is like finally dropping the weights and sprinting towards his goals. Those who insincerely misunderstand, who intentionally distort the motives of a pure-intentioned individual, then, no longer have the opportunity to block his path; instead, they are the ones left to stand on the sidelines shouting frustratedly in the wind of his trail.