A proverb is a simple and concrete saying popularly known and repeated, which expresses a truth, based on common sense or the practical experience of mankind. They are often metaphorical.
Here is my proverb (which is one I believe and endorse wholeheartedly) ...
"The early bird gets the worm and the early cat gets the bird"
but, unfortunately, I usually forget to set my alarm and am nearly always asleep at this crucial hour. Purr.