YOU SAID:

the flesh is willing but the spirit is weak

INTO JAPANESE

肉は喜んでですが、精神が弱い

BACK INTO ENGLISH

Spirit is willing flesh is weak

INTO JAPANESE

精神が肉体は弱い

BACK INTO ENGLISH

Spirit but the flesh is weak

INTO JAPANESE

精神が肉体は弱い

BACK INTO ENGLISH

Spirit but the flesh is weak