You will only go as far as your belief takes you. There would be chances and opportunities that you would be able to jump on because you believe you can do it. External motivation may be helpful, but in the toughest times you need the internal motivation to keep going.
Counting the little victories and successes you have had in times past is a positive way of reminding yourself that there is greater to come from your life. This is the time to keep hope alive and to keep moving. Only those who face challenges will be able to see how big what they carry on their inside is.
To make the most of life, you must believe in yourself.