Does it Terrify You?

If it doesn't scare you, if you're not so passionate about it that you can't get it off your mind then it's not going to sustain your interest or your willpower long enough to make something of it.
But if it's terrifying and amazing and you get excited just at the thought of it, pursue it, throw caution to the wind and put every ounce of energy you have into it because you and only you have the power to make it happen!