Adverb
In an involuntary manner; not voluntarily; not intentionally or willingly.
Source: Webster's dictionaryOften, even after years, mental states once present in consciousness return to it with apparent spontaneity and without any act of the will; that is, they are reproduced involuntarily. Hermann Ebbinghaus
Genius is no more than childhood recaptured at will, childhood equipped now with man's physical means to express itself, and with the analytical mind that enables it to bring order into the sum of experience, involuntarily amassed. Charles Baudelaire
Every soul, the philosopher says, is involuntarily deprived of truth; consequently in the same way it is deprived of justice and temperance and benevolence and everything of the kind. It is most necessary to keep this in mind, for thus thou wilt be more gentle towards all. Marcus Aurelius
A childish feeling, I admit, but, when we retire from the conventions of society and draw close to nature, we involuntarily become children: each attribute acquired by experience falls away from the soul, which becomes anew such as it was once and will surely be again. Mikhail Lermontov
Man first unconsciously and involuntarily creates God in his own image, and after this God consciously and voluntarily creates man in his own image. Ludwig Andreas Feuerbach
No one rides a horse without moving his head, voluntarily or involuntarily. Yoruba Proverb