Noun
The quality or state of being spontaneous, or acting from native feeling, proneness, or temperament, without constraint or external force.
The tendency to undergo change, characteristic of both animal and vegetable organisms, and not restrained or cheked by the environment.
The tendency to activity of muscular tissue, including the voluntary muscles, when in a state of healthful vigor and refreshment.
Source: Webster's dictionaryTake a commonplace, clean it and polish it, light it so that it produces the same effect of youth and freshness and originality and spontaneity as it did originally, and you have done a poet's job. The rest is literature. Jean Cocteau
Often, 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
Winning children (who appear so guileless) are children who have discovered how effective charm and modesty and a delicately calculated spontaneity are in winning what they want. Thornton Wilder
The governing idea of Hellenism is spontaneity of consciousness that of Hebraism, strictness of conscience. Matthew Arnold
If the image was sketched onto the canvas and spontaneously drawn, colour would often be restrained and unfree... The most important and the most difficult liberation process we went trough, the one that has distinguished our art, was the freeing of colour, the transition to a painterly spontaneity. Asger Jorn
Art is the illusion of spontaneity. Japanese Proverb