Those that only take a nibble here and a nibble there will never attain anything ... Those who really want to be yogis must give up, once and for all, this nibbling at things. Take up one idea. Make that one idea your life - think of it, dream of it, live on that idea.
You may encounter many defeats, but you must not be defeated. Please remember that your difficulties do not define you. They simply strengthen your ability to overcome.