But if you want to achieve, the only way to do it is to work for it.
You must be relentless, unswerving in your devotion to reaching your goal, and harder on yourself than anyone else. You can't take solace in other people telling you "good try" or "tough break". You need to hate failure more than you love success, because you'll forget goals the second you achieve them, but failure will live with you forever.
And if you choose not to push, then Don't be upset by the result you didn't get with the work you didn't do.