By using stale metaphors, similes and idioms, you save much mental effort, at the cost of leaving your meaning vague, not only for your reader but for yourself.
George OrwellThere exists a huge dump of worn-out metaphors which have lost all evocative power and are merely used because they save people the trouble of inventing phrases for themselves.
George OrwellThe plant is blind but it knows enough to keep pushing upwards towards the light, and it will continue to do this in the face of endless discouragements.
George Orwell