Buildings are usually representations of our personality when we see them in dreams. It has to do with our attitudes and beliefs that we have constructed in life. What kind of building was it? A tower-like building refers to the spiritual self. I'm assuming it was a regular high-rise building? Black represents the aspects of all colour but can be linked to negativity and judgement, however it can also represent strength and virility, which links with the symbol of you having black hair (if hair plays a significant role in a dream it links up with strength and ability). The flowers in your hair could be an indicator of a new beginning that you are aware of in your life, or it could just be a link to the obvious aspect of beauty. Having white eyes or a loss of sight could possibly mean that you have a loss of clarity about something, but then again if you can still see then it could possibly just mean that you should be observant (in this case possibly of the new event that is taking place in your life), and the pacing back and forth could mean that you should set goals for yourself. The angel's wings would be an indication of your power to transcend your difficulties. If the guy's voice is unknown it could signify that you have aspects of your personality that you aren't aware of yet. And then finally I think what is meant by the phrase he says is that what you think of and create in your mind becomes reality, so I don't know if you're thinking of taking on something new and you have doubts about it but it would appear that your dream is telling you that you are able to do what you are attempting, you just need to set some goals and you'll make it. That's how I see it and I hope it makes sense in a way.