Let Sleeping Dogs Lie

Etymology:

• This ancient phrase originated in 13th century. Later in 14th century, it was used by Geoffrey Chaucer in one of his books which says it is good to avoid waking up a sleeping dog. Imagine, you come near a sleeping dog, you must be thinking the dog might not pounce on you or bite you, so it would be better to leave him sleeping. Similarly, it is better to be quite and not to stir anything that might cause a problem.