‘One day the old monk Baizhang, addressing his assembly, said, “Work the rice field for me, and I’ll instruct you in the fundamental principles of the great matter.”
After the monks had worked the rice field for the master, they said, “Now master, please instruct us in the fundamental principles of the great matter.”
Baizhang spread open his arms.’ (Shinji Shobogenzo)
It won’t necessarily help your grasp of the fundamental principles, but Baizhang is well-known for his edicts on work.
Shundo David Haye 
Work Circle, Work Study, Morning Chores. Man has always had to work by thr sweat of his brow to earn his food snd shelter.
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