The total speech act comprises both the act of uttering words and the act of meaning.

No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

Psychology must be a practical science, concerned with the how and why of mental operations.

"I am not interested in the surface of things, but in what lies beneath."

The process of solving a mathematical problem is often more important than the solution itself.

科学的进步不仅是通过回答问题，而是通过提出更好的问题。