Making the subject unaware of the details, or blind to knowing the drug is there.
Explanation:
The heart weighs between 7 and 15 ounces (200 to 425 grams) and is a little larger than the size of your fist.
^ the person above is correct
The answer would be introspection. It is then the examination of one's conscious thoughts as well as feelings. It relies on observation of a person's mental state yet spiritually it refers to examining one's soul.Hope this would be of help.