photo for illustration only 
Once my friend’s brother suffered from fever. A new doctor told him not to eat food till the fever is cured. Now he left eating and became weaker. No suggestion worked with him. At last with my suggestion my friend took him with the same doctor. When doctor said that he could eat food when fever is down. He started eating.

Some suggestions are when given by reliable person will be difficult to be filtered by conscious mind. They can only be replaced by another suggestion by the same person or other reliable person more than him.
Discovered by +Don Prince