If you are bitter at heart, sugar in the mouth will not help you

Don't be too sweet lest you be eaten up; don't be too bitter lest you be spewed out

What you don't see with your eyes, don't invent with your mouth

He that can't endure the bad will not live to see the good

Surrounding yourself with dwarfs does not make you a giant

Everyone is kneaded out of the same dough but not baked in the same oven