Students become discouraged in their practice because they are pushing themselves too hard, or they are not pushing themselves hard enough. “Kung Fu” translates approximately to “skill that is acquired through hard work over time.” Students need to pace their practice and focus on what they are learning as they work on making it better. If you can improve only a fraction of a percent every class, the overall improvement over five or six years will be remarkable. “Slow and steady wins the race” is a good concept to follow, as long as you are focusing on getting better: better stances, better balance, better focus, etc.
Don’t hope for your life to become easier. Push yourself to be a stronger and more capable person.