I think even if you're in a chair, and you're sitting up straight with good posture, maybe hands on knees.

哪怕只是坐在椅子上，坐直并保持良好姿势，也许双手放在两膝上。

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Can't my mind take off from there and push straight ahead to the idea of the perfectly straight, even if I never have encountered it before?

即使我之前没有直接碰到过,难道我的心灵不能借此来推断出,完美的直线是什么样子的吗

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