Music: A gate. An excuse not to listen to the world, yet the world is music in itself. Nothing but absolute quiet could compare. Though, in my opinion, the Scottish highlands provide the best kind of music this world could provide to us lucky saps who deign to exist here.
Dreams: What our subconscious minds want as reality, yet it seemingly is unreachable. Thought what's lurking in the back of our minds could escape into our dreams. For dreams are a way for us to live that fantasy, even for just the night our minds could be free to explore.
Books: Escape to another world completely your own. Of course you share it with other readers, but that's the beauty of your "own world"; it exists for you and if you wish, others you would like to make knowledgeable of it's existence.
Hidden: Everything. Every little, insignificant, important, obvious, unscrupulous thing should be hidden.
Silence: Solitude is always the way to go. Never speak if the words aren't in tune to your thoughts. It would be pointless and your meaning isn't as convincing as it would come across were it be true.
Emotion: Heartless. Though is that befitting anyone of this world? We all feel emotion. No matter what science tells us or directs our thoughts to believe, we all feel some kind of emotion. Whether it be on a high level, or very subtle one.