Unreasonable silence is folly. [ Proverb ]

Unreasonable haste is often the direct road to error. [ Moliere ]

He who knows not how to bestow a benefit is unreasonable if he expects one. [ Publius Syrus ]

Dictionaries have come to be, in too many cases, the pernicious record of unreasonable, unwarranted, and fleeting usage. [ R. G. White ]

Musical people are so absurdly unreasonable. They always want one to be perfectly dumb at the very moment when one is longing to be absolutely deaf. [ Oscar Wilde, An Ideal Husband ]

In human life there is a constant mutability; and it is unreasonable to expect an exemption from the common fate; life itself decays, and all things are daily changing. [ Plutarch ]

Nothing is more unreasonable than to entangle our spirits in wildness and amazement; like a partridge flattering in a net, which she breaks not, though she breaks her wings. [ Jeremy Taylor ]

A man who allows himself to be convinced by an argument is a thoroughly unreasonable person, which accounts for so much in women that their husbands never appreciate in them. [ Oscar Wilde, An Ideal Husband ]

In human life there is a constant change of fortune; and it is unreasonable to expect an exemption from the common fate. Life itself decays, and all things are daily changing. [ Plutarch ]

It would not be more unreasonable to transplant a favorite flower out of black earth into gold dust than it is for a person to let money-getting harden his heart into contempt, or into impatience, of the little attentions, the merriments and the caresses of domestic life. [ Mountford ]