Karl Wilson Gehrkens, Essentials in Conducting
“ Although not so readily understood because of the absence of symbolism, phrasing is quite as important an element in the expressive rendition of music as it is in the case of language. In order to interpret properly the conductor must first of all determine what tones belong together in a group; must make the individuality of these groups evident by slightly separating them, but usually not to the degree of disturbing the basic rhythmic flow; and must so manage the dynamics and tempo of each phrase as to make its content clear to the listener. ”
