“The great thing about tai chi is it can be done standing, holding onto a chair or sitting,” Gurney explained.
From the sentence “A force of four ounces deflects a thousand pounds” we know that the technique is not accomplished with strength.
The spectacle of an old person defeating a group of young people, how can it be due to swiftness?
Stand like a perfectly balanced scale and move like a turning wheel.
From Tai Chi Classics