In essence

If the human being who answers these tendencies assumes a submissive behavior, in essence a lowering of head and shoulders, wavering glance, absence of all preparations for attack, general weakening of muscle tonus, and hesitancy in movement, the movements of attempt at mastery become modified into attempts at the more obvious swagger, strut and glare of triumph.

Indigenous people, such as agriculturists, hunters, and pastoralists initiated a system of totemism and tabooism which in essence was a natural law against killing and eating certain animals.

The viol, he argued, was in essence a bowed guitar, the result of a cross-fertilisation between the 15th-century Spanish plucked instrument known as the vihuela de mano and the medieval fiddle.

The study of the sounds within stars is known as astroseismology, and a separate report in Science details the findings of more than 500 stars whose deep rumblings Kepler has measured. As convection processes within stars move masses of material up from the core, great pressure waves - in essence, sound waves of very low frequency - are created.