Christoph Gottfried Bardili (18 May 1761 – 5 June 1808) was a German philosopher and cousin of Friedrich Wilhelm Joseph Schelling. He was critical of Kantian idealism and proposed his own system of philosophy known as rational realism, a view based purely upon "thinking as thinking".
Bardili was born on 18 May 1761 in Blaubeuren in the Duchy of Württemberg. In 1786 he became a Repentant at the Stift, a Protestant theological college in Tübingen. In 1790 he became a professor of philosophy at the Karlsschule in Stuttgart. After the closing of the Karlschule in 1794, he became a professor of philosophy at the Stuttgart Gymnasium Illustre where he taught until his death on 5 June 1808.
He dissented strongly from the Kantian distinction between matter and form of thought, and urged that philosophy should consider only thought in itself, pure thought, the ground or possibility of being.
The fundamental principle of thought is, according to him, the law of identi