My father-in-law passed away due to illness, how should I write a condolence?

I think the condolence should be written like this.

Master Taishan passed away from illness, which made me extremely sad. Think back to when your father-in-law was alive. Take care of me in every possible way and love me in every way. My heart is always in debt. When my father-in-law was ill, I stayed at his bedside as a filial piety. However, there is no way to save the day. May my father-in-law’s spirit be in heaven. We are at peace. May my father-in-law live happily ever after in heaven.