Something must exist in that non-physical or spiritual realm before it can be manifested here on the physical.
We experience it first - even if ever so briefly on the astral - before it manifests.
The answer to a lot of our maladies can be found in our vibrational alignment.
The answer to so many of our conditions, illnesses, dis-eases can be found in our perceptions and beliefs about these things. The physical condition, illness or dis-ease was not manifested FIRST and thoughts / feelings came after. It was the other way around. The thoughts / feelings came FIRST and the physical condition, illness or dis-ease was manifested because of it.
Shifting from the vibration of misalignment (condition, illness or dis-ease) will take an understanding of oneself along with honesty with oneself. This process may take some time. We have been conditioned by our society to not believe in ourselves. We have been told for many years that we require the aid of "modern medicine" to "cure" these conditions, illnesses, and dis-eases and while I do believe they aid with acute physical pain and may ease the physical symptoms - they are not the answer we are seeking. The answers can be found within us.
Many people are not aware of the power they hold within them and feel that they are victims of the world or even victims of their own physical bodies or "meat suit". And perhaps you have met some individuals who have some sliver of understanding about personal power and the ability to create their life experience but when they are offering advice to those who are in the vibration of a physical condition, illness or dis-ease they simply suggest the suffering individual "get over it" or offer the idea that "many people have it worse than you" or "stop over-thinking it" and while this is a perception that the adviser has, the suffering individual is unable to see beyond their current point of view or perception. They do not yet understand their own vibrational alignment. Thinking about the REASON for their condition, illness or dis-ease and not dwelling on the SYMPTOMS of manifestation of the condition, illness or dis-ease will actually lead to understanding the suffering individual's root or source of the issue and give them the ability to shift out of their current vibration and begin the realignment with health and well-being.
So while thinking positively will not be the "magical cure" for the condition, illness or dis-ease it will aid in the realignment process. Looking at our current life experience and not only taking note of those people, situations, and things that we feel love, happiness, and joy about (Count your blessings) but recalling the actual feeling of love, happiness,and joy we have for each of these people, situations or things in our lives actually shifts our personal vibration bringing us closer to love and more distant from fear, which is ultimately the original root of all suffering.
I am not suggesting that the suffering individual "shouldn't" feel the way that they do. They are most certainly experiencing some sort of pain or suffering and there is a reason for it. There is something within their current condition, illness or dis-ease for them that will allow them to gain something from it and only they know what it is either on a conscious level or on an unconscious level. Sometimes I find the moments when we suffer the most is when we gain understanding about ourselves the greatest however to continue to dwell within that vibration of suffering (fear) for extended periods of time can definitely be detrimental to the individual's over-all well being and most certainly will lead to the destruction of self at some point. Even that however, is neither "bad" nor "good" - it is the inevitable conclusion to all human life experiences.
We are the creators of our lives. We choose our personal experiences when we are here manifested on the physical plane of existence (Earth). Yes, we can be and most certainly are influenced by others especially those we have established an interpersonal relationship with but we are also influenced by all beings that are living on the planet with us at this time, but we are in control of our lives. We ultimately make the choice to allow the influence of others or to offer a contrary vibration (point of view or perception) to theirs and if we do not offer the contrary vibration we will thus experience what they desire. This includes the physical manifestation of all health conditions, illnesses and dis-eases.
We CAN and DO control our physical bodies.
We do this with our thoughts, our emotions and our personal energy.
WE manifest our suffering and WE manifest our cures.