An individual has not started living until he can rise above the narrow confines of his individualistic concerns to the broader concerns of all humanity.

【释义】社会常把内向病理化，凯根用实验证明：内向气质是大脑独特的生物设定，藏着深度思考与独立创新的宝藏。

"The writer's job is to be a witness to his time."

"The essence of mathematics lies in its freedom."