YOU SAID:
The best is yet to be.
INTO JAPANESE
最高はまだありません。
BACK INTO ENGLISH
There is no best yet.
INTO JAPANESE
まだベストはありません。
BACK INTO ENGLISH
I do not have the best yet.
INTO JAPANESE
私はまだベストを持っていません。
BACK INTO ENGLISH
I do not have the best yet.
That didn't even make that much sense in English.