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The opportunity does not go hand in hand, so when they come, you’d better hold them.

The interest of the behaviorist in man's doings is more than the interest of the spectator—he wants to control man's reactions as physical scientists want to control and manipulate other natural phenomena.

唯一的正義就是遵循靈魂真誠的直覺，無論是憤怒的還是溫柔的。

癌癥治療的未來在于免疫療法。