Psychological blindness is inability to see or understand or comprehend the shortcomings which we enjoy now . Spiritually, one will be blind as long as he is awake either psychologically or socially . In a higher sense all are the same or similar. When a work stalls for a long time and prayer too does not move, analyse that work comparing it with another successful work on attitude, skills, alertness, values, etc and you will quickly spot out the obstacle or the missing link . The opposites meeting, instead of receding, produces a result in practical life .
Sensitivity is the knowledge of the physical .
The process of wish fulfilment is not known though we know the result. The will in the wish and the will in the atmosphere are the same, the one being one strand of the whole which is the other. Of the three wills, the mental will is the most feeble. The vital and the physical will can accomplish much more. This yoga tries to bring out the spiritual will in the physical to bear upon the physical organisation of the world .