I am studying Japanese.

You shouldn't laugh at his failure, because misfortunes can happen to anyone.

He thought deeply and said, 'I think, therefore I am.'

There are many arguments arising from diverse opinions about that issue, and no conclusion has been reached.

There is a class observation at my son's school tomorrow.

The use of mobile phones is prohibited during class.

His way of thinking is very philosophical.

He was troubled by the scholasticism.

He is majoring in moral philosophy at university.

He is a famous philosopher.