在奥林匹克誓言中，我只要求一件事：体育忠诚。

The proletariat is the universal class, the class whose radical chains are capable of bursting asunder.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.

Learning to read involves the development of attentional networks that allow children to focus on letters and words while ignoring distractions.