It is related to the subconscious mind and its capabilities, and when you say that you have something with all positivity, confidence and gratitude, you will own it. For example, you want to have a job, so you imagine that you own it and feel everything when you have this job. By the law of attraction. It is like when you imagine that you have a tulpa, so you must fully believe that you have it and you must believe in its existence and that it is already beside you, so now you have attracted it to you, so I am not an expert in the subject, but during my browsing I found this simple definition. (edited)