It is equally important to learn from experience and from books.

Teachers should know that the quality of the answers depends significantly on the quality of the questions.

To know – that's true happiness.

Knowledge can be acquired by education, reading, communicating and observing, but also simply by living.

Acquiring knowledge is the most fruitful effort.

Concerning mistakes, follow three simple rules. Firstly, correct a mistake that you made whenever it is possible. Secondly, don't repeat the same mistakes. Thirdly, learn from past mistakes.

Nowadays, focusing on transferring applicable knowledge is a very challenging task that all teachers face.

To attain knowledge, learn continuously. To become wise, observe continuously.

Do your best to learn more to be able to act better.