manifestation
Freud proposed three recognized provinces of the mind: the conscious mind (current awareness), the preconscious mind (memories that can be easily retrieved), and the unconscious mind (thoughts, memories, and desires that are not easily accessible).
Evident means clearly apparent or obvious to the mind and senses. It implies that something is easily perceived or understood without needing additional explanation or proof.
The first thing that comes to mind is "enigma."
1. Understood. "I realized why she was angry with me." 2. Made real. "He realized his plans for the worlds biggest pyrogi."
* Make a point of looking for this girl and apologizing to her and tell her your mind was on something else and you didn't mean to ignore her. The fact you recognized you did ignore her and want to make amends with her shows how mature you are and that you understand people have feelings and they hurt easily.
Do you still feel something in your body and mind when you see him/her? It might surprise you sometimes when you get over your crush very easily. :)
There Is Something on Your Mind was created in 1978.
Stubborn
The most common thing for people to loose (besides their mind) is their keys, their temper, track of time, or maybe the money they spent on lottery tickets.
It seems there may be a typo in your question. Assuming you are asking about the word "perception," it refers to the way in which something is understood or interpreted by someone's mind. It involves the process of taking in, organizing, and interpreting sensory information from the environment.
to have something in mind
When something is "on your mind" or "come to mind" it means you're thinking about it. Something has just occurred to you in your brain.