Luke 7:40 KJV
And Jesus answering said unto him, Simon, I have somewhat to say unto thee. And he saith, Master, say on.
Luke 7:50 KJV
And he said to the woman, Thy faith hath saved thee; go in peace.
When Jesus showed Simon the woman's testimony, He pointed out her works. But when he addressed her concerning her own salvation He spoke of faith.
Only faith saves, but only works bears testimony of salvation. Work is essential, not to the saving of the soul but to the ministry toward others.
Here is the balance between faith and works. Faith saves and leads to the works that ministers the love of God to others.