silent_partner, you don't only create the things you want, unless that's what you wholly believe, Know. Until you reach a certain level or state of consciousness (control over your thoughts and emotions), you still create some thing unintentionally. And if you think of people as dead, or in the past, then that's what they are. Same as if you think of something as fantasy, it will remain so - that's why there aren't lots of dragons flying around.
it is more about awareness than thought and perception. You are aware of something and aware of the state of it (physical, mental, spiritual, imaginary...) and then that is so. Your 'knowing something as so', your belief, that is primary.
in order to experience love, there must be the possibility of fear, and that cannot be if there isn't the experience of getting something you don't want (I chose to have the experience of 'getting experiences I didn't choose'). So we have that first, and then we grow, we realize our true nature.
The Law is quite like gravity - in order to live well with it, you need both knowledge of it, and balance. Even after you know that belief creates reality, you still need to learn to control it (like balance). If you don't know it's there, you'll spend your life not knowing why 'the ground keeps beating you up'