YOU SAID:

my heart is like a stone, tough and not light

INTO JAPANESE

私の心は石のようで、丈夫で軽くはありません

BACK INTO ENGLISH

My heart is like a stone, strong and not light

INTO JAPANESE

私の心は石のようで、強くて軽くはありません

BACK INTO ENGLISH

My heart is like a stone, not strong and light

INTO JAPANESE

私の心は石のようで、強くて軽いわけではありません

BACK INTO ENGLISH

My heart is like a stone, not strong and light