Question

swiftness and lightness of movement​

Answer 1

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Sweetness and light is an English idiom that can be used in common speech, either as statement of personal happy consciousness, (though this may be viewed by natives as being a trifle in earnest) or as literal report on another person. Depending upon sense-of-humour, some may use the phrase with mild irony. For example: The two had been fighting for a month, but around others it was all sweetness and light... P. G. Wodehouse, esteemed humorous writer employed the phrase often, sometimes with a slight nod to the phrase's dual-edge. Originally, however, "sweetness and light" had a special use in literary and cultural criticism meaning "pleasing and instructive", which in classical theory was considered to be the aim and justification of poetry.