There is no prejudice in teaching.

Don't learn from Zhao Kuo,

Sun Tzu's Art of War is written on paper.

The first two sentences say that Tao Xingzhi is keen on the mass education movement and is committed to cultivating rural teachers to popularize rural education; The last two sentences are about Tao Xingzhi's thoughts of teaching and doing in social life and labor practice, using both hands and brains.