YOU SAID:

greatness is nothing if it be not lasting

INTO JAPANESE

それが長続きしないのであれば偉大さは何もない

BACK INTO ENGLISH

There is nothing great about it if it doesn't last long

INTO JAPANESE

それが長続きしなければそれについてすばらしい何もありません

BACK INTO ENGLISH

There is nothing great about it unless it lasts

INTO JAPANESE

それが持続しない限りそれについて素晴らしい何もありません

BACK INTO ENGLISH

There is nothing great about it unless it lasts