Jean-Jacques Rousseau:
(Geneva, Switzerland, 28 June 1712 – Ermenonville, France, 2 July 1778).
Pioneering philosopher and writer. He influenced literature, pedagogy and politics. Besides being a philosopher and pedagogue, Rousseau was also a composer. He composed seven operas and other musical pieces. He was also a lover of botany. He is also known for his personality. Rousseau began his career as a footman, secretary, house and music teacher.
When one is young one must study wisdom, when one is old one must put it into practice.