illustration (attribution, if any possible, is at the end of the article)
The word Nibbāna means "cool." Back when it was just an ordinary word which people used in their homes it also meant "cool." When it is used as Dhamma language, in a religious context, it still means "cool," but refers to cool from the fires of defilement (kilesa), while in the common people's usage it means cool from physical fires.
When seeing a fire go out or something hot cooling down, look for the meaning of Nibbāna.
When bathing or drinking ice water, when a breeze blows or rain falls, take notice of the meaning of Nibbāna.
When a fever subsides, a swelling goes down, or a headache goes away, recognize the meaning of Nibbāna as being found in those things.
When perspiring, sleeping comfortably, or eating one's fill, see the meaning of Nibbāna.
When seeing an animal with all its fierceness and danger tamed out, see the meaning of Nibbāna.
All of these are lessons to help us understand the nature of Nibbāna in every moment. The mind will regularly incline towards contentment with Nibbāna and this helps the mind to flow more easily along the path of Nibbāna.
— Buddhadasa bhikkhu: Nibbāna for everyone