"KEEP YOUR HEART BURNING, GRIT YOUR TEETH AND MOVE FORWARD."

Scene context

From Rengoku's final words. Following 'Stand tall and be proud,' he gives the survivors a sequence of plain imperatives — burn your heart, grit your teeth, face forward. The line provides the title-image of the Mugen Train film and is one of the most repeated lines in the franchise.

Character voice

Three short imperatives strung together, each ending in a hard sound. Rengoku's emotional peak is rhythmic, almost a command-line of inheritance.

Grammar

～せ / ～け (imperative chain) JLPT N4

Three plain imperatives chained: 燃やせ ('burn'), 喰いしばって ('grit, ~te-form'), 向け ('face / turn towards'). The build creates a martial cadence — each verb is a discrete instruction.

歯を喰いしばる (idiom) JLPT N3

Literally 'to bite hard' — figuratively, to endure / to bear pain. A standard idiom for perseverance through hardship.

前を向く (idiom) JLPT N3

'To face forward' — to move on, to focus on what's ahead instead of looking back.

Vocabulary

• 心 [こころ] JLPT N5 heart, mind, spirit
• 燃やす [もやす] JLPT N3 to burn (transitive)
• 歯 [は] JLPT N5 tooth
• 喰いしばる [くいしばる] JLPT N3 to clench (one's teeth) / endure

Sources

Verified against primary sources

• [manga_volume] Demon Slayer Vol. 8, page 93
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  心を燃やせ歯を喰いしばって前を向け

• [manga_shorts_bilingual] shared_assets/manga_bilingual/KimetsuNoYaiba/vol_008/093.json#dialogue[2]
  Show captured text

  心を燃やせ歯を喰いしばって前を向け

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