I'm sorry, but this sounds like lying to people and I am not going to tell people what they want to hear when something is wrong, but to break this down on how I believe it is in the design world:

1- Encourage their dreams

1. I always encourage peoples dreams, but only if through design it is realistically possible within a timeframe given.

2- justify their failures

2.When it comes to justifying someone's failures, if there is a failure in a design and provided they will listen, I can justify that failure with knowledge that I possess about design.

3- Allie their fears

3. The way I would calm their fears would be by showing them examples and explaining my process to them and make sure that I answer all of their questions.

4- confirm their suspicions

4. I can confirm their suspicions if they are accurate. I will know from a design standpoint if their is something for them to be suspicious about. Something of this nature may take some research.

5- help them throw rocks at their enemies

Personally, I do not like this statement because I am not going to help anyone throw rocks at their enemies, but I prefer to think of this as "how to beat their competition" because in essence that is what I do when branding or designing something. I would help someone stand out from their competition.