How to comfort your friends and elders when they are seriously ill?

The reference sentences are as follows:

1. "I know this is a very difficult time for you, and I fully understand your worries and uneasiness."

2. "Please believe that no matter what the outcome is, you will not be alone. I and other friends are here to support you and cheer you up."

3. "Stay optimistic and strong, because a positive attitude will also help with recovery. At the same time, if you need any help, please feel free to tell us."

4. "We will respect your privacy and personal space, appear only when you need it, and provide all needed help and support."