An old friend of mine who is a talented artist was walking on a lake without sinking
Dreams about walking on water, like the one your friend had, are often associated with feelings of control, power, and confidence. Since your friend is walking on the water without sinking, this may suggest that they feel like they are in control of their life and are able to navigate any challenges or obstacles with ease.
The fact that this friend is talented in art may also play a role in this dream. It could represent their creative abilities and how they are able to use their skills to stay afloat in difficult situations.
Overall, this dream seems to be a positive indication that your friend is feeling confident and in control of their life.