When Fortune flatters, she does it to betray

It is more easy to get a favor from fortune than to keep it

Fortune is like glass - the brighter the glitter, the more easily broken.

Do not turn back when you are just at the goal.

Never thrust your own sickle into another's corn.

One ungrateful man does an injury to all who are suffering. [Lat., Ingratus unus miseris omnibus nocet.]