Excerpts from Patrick's book "Relax Deep Mind" :

Taiji is an internal style of Chinese martial art, stressing the principles of relaxation and yielding both in application and in daily life. Taijiquan training develops inner strength and harmony through the coordination and relaxation of Mind and body. Externally, Taiji is the art of movement for health and self defence. Internally, Taiji is Raja Yoga, the science of Mind and internal energy or Qi (气)...Daoism provides the philosophy while Taiji provides a practical method for incorporating those Daoist principles into practice.

People of all ages and degrees of health are equally able to practise Taiji. It leads people from the mundane everyday state to a position of inner knowledge, inner calmness and inner power. Success in practice requires an attitude of genuine enquiry, patience and perseverance, an openness to practise according to the teaching and a willingness to constantly examine and refine your motives according to your inner conscience.