From the point of view of technical combat:
It's not the fist that's powerful, it's the person practicing it. Regardless of which technique is practiced, practicing it to the depth of its essence is awesome.
Premise:
Self-practice for 10 years is not as good as the "master" point: taijiquan and taekwondo have false masters. Rooted in the wrong master, no matter how much practice is useless.
Fist to ten thousand times its God since the Ming: with a good master, they do not insist on it is useless.
Fist to the flesh: martial arts is to fight with people. Don't dare, don't want to hit people don't practice martial arts.
Want to hit people first learn to take a beating: if you are afraid of getting hurt, do not practice martial arts.
From the perspective of fitness and health:
Don't practice martial arts! There are many ways to fitness and health, through the practice of martial arts fitness, health, joints have a high chance of injury. Have the money to go to the gym to do a card, no money to go running, climbing or swimming, etc. are good choices, jumping square dance as fitness.
Additionally, encountered practicing Tai Chi, directly to him to challenge the loose hand, can beat you and then learn from him. Will not hit people, only know "health", "cultivate the heart" of the practice of taiji drill, not taijiquan.