YOU SAID:

Be strong to be useful

INTO JAPANESE

有用であることが強いこと

BACK INTO ENGLISH

Strong thing to be useful

INTO JAPANESE

強い事が有用であるために

BACK INTO ENGLISH

For strong that it is useful

INTO JAPANESE

強いにとっては有用であること

BACK INTO ENGLISH

It is useful for the strong

INTO JAPANESE

それは強いのに便利です

BACK INTO ENGLISH

It is useful for strong

INTO JAPANESE

それは強いのに便利です

BACK INTO ENGLISH

It is useful for strong