Consider whether fulfillment of the goal you have chosen will constitute success. What is success? If you possess health and wealth, but have trouble with everybody (including yourself), yours is not a successful life. Existence becomes futile if you cannot find happiness. When wealth is lost, you have lost a little; when health is lost, you have lost something of more consequence; but when peace of mind is lost, you have lost the highest treasure.
Self-realization means to know truth through yourself, and not through others. By seeking God first, through Self-realization, all things—strength, power, prosperity, wisdom, health, and immortality—will be added unto you.
Since you alone are responsible for your thoughts, only you can change them. You will want to change them when you realize that each thought creates according to its own nature. Remember that the law works at all times and that you are always demonstrating according to the kind of thoughts you habitually entertain. Therefore, start now to think only those thoughts that will bring you health and happiness.