"Rulai" was translated from the Sanskrit word "Tathāgata". "Ru" means "suchness" (tathatā), or "according to the reality" (Yathābhūta?), i.e. the ultimate reality of all dhammas, while "lai" means "come". "Rulai" (Tathāgata) is interpreted in the Buddhist scriptures as "coming by the path of Tathāgata" or "coming according to the reality". Tathāgata is a general term and another name for "the Buddha". Thus Gotama Buddha can be called Gotama Tathāgata, and Amita Buddha can be called Amita Tathāgata.
“如來”這個名詞是從梵語Tathāgata譯出來的?!叭纭弊志褪恰罢嫒纭保╰athat?。匆磺蟹ǎㄊ挛铮┑恼鎸崰顩r,它又包含“如實”(Yathābhūta?)的意義。佛經(jīng)對“如來”的解釋是:“乘真如之道而來”,又說“如實而來”?!叭鐏怼笔且粋€通用名詞,它是“佛陀”的異名。如釋迦牟尼佛,可以稱釋迦牟尼如來;阿彌陀佛,可以稱阿彌陀如來。