Nude by originartists : Art in the beginning of the process is human, and therefore is a synonym of knowledge. Nowadays, art can be viewed in essence the expression of human creativity.
See Nude Paintings
Art is very difficult to explain and also difficult to assess, that each individual artists choose their own rules and guiding parameters or work, can still be said that art is a product of the process and choose a medium, and a set of rules for the use of the medium, and a set of values that determine what a reasonable transmitted through the medium of expression, to convey the belief, idea, sensation, or feeling the way as effective as possible for the medium. Even so, many artists find the influence of other people's past, and also some of the guidelines has been shown to express ideas through symbolism and a particular form (such as the daffodil which means death and red roses which means love).
by 
An important component of Zen art is that the character and spiritual force of the devotee is transmitted into the painting by the concentration of the artist at the time the work was brushed. Many of the most compelling works have been painted by persons of advanced age who have spent a lifetime in disciplined Buddhist practice. 
