Martial Arts refers to Military Arts if we take the name literally. Therefore their purpose is to teach a soldier to defend himself/herself at close quarters (or with weapons) in the field of battle or duty. Therefore philosophy and spiritual development do not really come into it.

Kuoshu is Chinese for "National arts" and can include anything. However, the use of this term is generally linked with a school or system of Chinese Arts which encompasses any form of self-defence, exercise, health, fitness, healing, herbalism, diet, et cetera. Not necessarily all, as:
a) not all people stay in a place long enough to learn
b) they don't have the patience
c) their instructor may not have all the knowledge of these subjects.

Philosophy is "ideas" or "professing", one who professes. This is why, after thirty-something years of serious training people have started to call me "Professor Mike Symonds"; feels strange sometimes as I still think of myself as a novice!

Philosophy can be applied in training many ways, but (the royal) "we" tend to think that it includes the original philosophies or beliefs of the peoples from whos country it originates. In our case Chinese. This happens, as we study some styles of Ch'uan-shu, especially T'ai Chi Ch'uan, we learn about the philosophic principles behind the Arts; the driving force.

We should also be aware that this philosphy, especially Taoism, is not "fixed" or the domain of one race or area. It is also modern and can be included in our lives today. Tao is the Way of Nature, and that never changes!

I would suggest that the mind is fixed on training and self-development; overcoming concieved problems.

I shall not go on. Just remember the phrase at the begining of the TV series, 'Kung Fu' when David Carradine says (as Kwai Chang Caine), "I seek not to know all the answers, but to understand the question".