Definition.com
An Obsession is sometimes best gotten over by going to bed with one's object of obsession.
Definition.com
Obsession is the single most wasteful human activity, because with an obsession one keeps coming back and back and back to the same question and never getting an answer.
Definition.com
An Obsession is an idea which you must get out of your mind if you are not to go out of your mind.
Definition.com
An Obsession is the demon of a world without faith. To express it is to project it outside yourself, to hunt it down, to exorcise it. Obsessions are the demons of a world without faith.
Definition.com
Obsession is not necessarily negative. Its the art of putting all your energy into one thing... its the art of transforming even what you eat for lunch into architecture.