How should I comfort my boyfriend when his grandfather passes away?

As follows:

1. The dead rest in peace, and the living work hard.

2. The deceased has ascended to the immortal world, and the living express their condolences.

3. Sorry, those who left don’t want you to be unhappy.

4. My condolences, don’t be too sad. Take good care of your body.

5. Birth, old age, illness and death are natural phenomena, so we should be patient and accept changes! Take care of yourself.

6. Grandpa will live a good life there. I don't want to see you too sad.

7. Birth, old age, illness and death are the laws of nature, and death is his final fate. Don’t be too sad.

8. Birth, old age, illness and death are the laws of nature! Don't be too sad, he will feel your filial piety!