1 Chronicles 16:11-12
Look to the LORD and his strength; seek his face always. Remember the wonders he has done, his miracles, and the judgments he pronounced.
Just at the moment when you think you need to stop working at something, stop yourself and talk to God! He has already made so many miracles and wonders happen in your life, so even at this moment, He can strengthen you to fulfill your goal. Tell God you want to succeed, stay committed to your request to Him and He will strengthen you every day until the job is done.