As the diction rises above this plain unimpassioned character, and becomes more and more informed with feeling and sentiment, the constituent vocal signs, and hence the whole vocal expression, become more and more expressive. In pitch there is frequent variation: in expressions of joy, astonishment, or for command, the voice assumes naturally a somewhat higher elevation; and with equal naturalness it descends below its normal level to utter the language of grave, solemn, and reverential feeling. Again, inasmuch as the interval of the second is the plainest and simplest within the command of the voice, in such diction as we are now considering, intervals of a third, a fifth, or even an octave, may be heard, both in simple intonations and in waves. Force, too, will not be unvaryingly applied, but will be greater or less according as energy or passion may demand. In stress the equable concrete will give place to the radical or to the final, to express energetic resolve; or, in the language of pathos, exaltation, reverence, supplication, and so on, to the median--the most effective of all modes for the expression of such deep feeling as is compatible with slow utterance. In time the rate of utterance will vary with the syllabic quantities, these being short and crisp in the language of vivacious conversation, but extended, and with distinct, attenuated vanishes, in grave and important monologue. In quality, whenever the diction, departing from its simple character, becomes pervaded by some deep emotion, the natural mode will give place to the orotund. And while effusive utterance is always the prevalent mode, it will give place to the expulsive mode or to the explosive, when energy of thought or force of passion requires it so. Thus, _as the diction rises_ from plain discourse to the language of feeling, _the appropriate vocal expression gathers intensity and becomes more varied_, assumes, as may be said, brighter colors and displays greater contrasts; and so, in the third class of diction, the diction of passion, it displays its intensest and most vivid modes--its brightest colors, its deepest contrasts.