You must have heard what the basic principle of Ayurveda is.
Samkhya is its original principle.
Ayurveda is treated only from the point of view of the Samkhya.
The soul is not treated, the soul is always free,
and if you do not accept the existence of body , then you will not treat it.
If you believe that disease is the intrinsic nature of the body, then you cannot cure it.
If the disease is intrinsic, then what is the treatment that needs to be done?
Due to this one must accept that disease has come from outside into the body ,
as does the Samkhya philosophy.
This is also the principle of Yoga
Now if you ask that if sorrow in humans is intrinsic or extrinsic?
If the sorrow is intrinsic, then there will be no answer.
This is a philosophical argument, bear it is in mind.
If the sorrow is intrinsic, then it can not be eliminated.
Man can never escape from sorrow,
so should not try to escape and go on suffering.
If it is decided that sorrow is not intrinsic, sorrow is not innate, then it can be removed.
Ayurveda also follows this principle that if the disease is extrinsic or intrinsic.
If the disease is innate  then it is not going to go, so its treatment is pointless,
if the disease is a extrinsic, then it can be treated and cured.
