What is the tower of practical applications made out of? Tungsten?
Literally: know – act – join – one
Alternately: One’s knowledge and deeds are in accordance. One’s actions must be guided by one’s knowledge, and knowledge only has meaning if it is demonstrated through action.
Notes: Reading 行 as gyou is considered an error in this compound, but 合一 may be replaced with 一致 (icchi, “union,” “agreement”) without any change in meaning.
This phrase comes to us from the work of Confucian thinker Wang Yangming in a text called the Zhuanxilu (Japanese 『伝習録』 = Denshuuroku).