What is a sentence using the word cynical?

I told him that my dog could find a fox, but he was too cynical to believe me.

Many people become cynical after a life filled with disappointment.

The cynical editor refused to publish my stories about everyday heroes.

"Do not feign affection nor be cynical about love, for in the face of all aridity and disenchantment, it is as perennial as the grass." (Desiderata)