Sumu to iishi kokoro no tsuki shi arawareba kono yo mo yami no harezarame ya wa

すむと言ひし心の月し現れば
この世も闇の晴れざらめやは

Roma-ji: Sumu to iishi kokoro no tsuki shi arawareba kono yo mo yami no harezarame ya wa
English Translation: If that heart's bright moon,
which you said would dwell and shine
clear, should now appear,
how then could the darkness of
this world fail to be dispelled?
Meaning: If the moon of the heart that you said would dwell apart and shine clear should appear, how could even the darkness of this world fail to clear?
Commentary: Miscellaneous Poems 733

Headnote: "Reply"
This is Saigyō's answer to Masasada's poem. If the moon of the heart appears, the heart that you said would dwell apart and grow clear, then surely even the darkness of this world must clear away, he says, encouraging Masasada's resolve to take vows. He takes up 'moon' and 'the darkness cleared' from the preceding poem and answers with the Buddhist figure of the moon of the heart.

First line, “sumu to iishi”: sumu is a pivot word joining dwelling apart from the world and the heart growing clear; a line of six syllables.
Second line, “kokoro no tsuki shi”: kokoro no tsuki, the moon of the heart, is a Buddhist figure for the enlightened mind; shi is emphatic.
Third line, “arawareba”: if it should appear.
Fourth line, “kono yo mo yami no”: the darkness of this world as well, taking up 'yami wa hareniki' from the preceding poem.
Fifth line, “harezarame ya wa”: me ya wa is rhetorical; how could it not clear? Surely it will.
Author: Saigyō
Source: Sankashu
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