Authors alone, with more than savage rage,
Unnatural war with brother authors wage. [ Churchill ]

To be ungrateful is to be unnatural.
The head may be thus guilty, not the heart. [ Rivarol ]

Some dreams we have are nothing else but dreams.
Unnatural and full of contradictions;
Yet others of our most romantic schemes
Are something more than fictions. [ Hood ]

Let me be cruel, not unnatural; I will speak daggers to her; but use none; my tongue and soul in this be hypocrites. [ William Shakespeare ]

In the present day, and especially among women, one would almost suppose that health was a state of unnatural existence. [ Beaconsfield ]

Some decent, regulated pre-eminence, some preference (not exclusive appropriation) given to birth, is neither unnatural nor unjust nor impolitic. [ Burke ]