LABOR OMNIA VINCIT
And some cats too of course:
Decus in labore.
There is dignity in work.
Labor ferendus est cibum petentibus.
Work must be endured by those seeking food.
Labor omnia superat.
Hard work overcomes all things.
Labore et scientia.
By means of effort and knowledge.
Ex labore dulcedo.
After effort, sweetness.
And a poster:
You be a worker, and God will be your helper.
(Latin: Esto laborator et erit Deus auxiliator.)