From Hesiod: 

“If you add a little to a little, and then do it again, soon that little shall be much.”

“It is best to do things systematically, since we are only human, and disorder is our worst enemy.”

“Work is no disgrace; it is idleness which is a disgrace.”

“Admire a small ship, but put your freight in a large one; for the larger the load, the greater will be the profit upon profit.”

“It will not always be summer; build barns.”