It's not the words

It is comforting that reading around ch'an and zen, Tibetan Buddhism and advaita for a number of years leads to a realisation that they have the same underlying truth. The gaps between the texts, the teachings and the practices can seem insurmountable at first. Even Buddha "never used words on a fixed basis"[1].But eventually all of these can be read interchangeably.

[1] The Diamond Cutter of Doubts - A Commentary on the Diamond Sutra, by Master Han Shan, as in Ch'an and Zen Teaching, Volume 1, Lu K'uan Yu, published Samuel Weiser, 1993