Right impression must be matched with right expression. Remember that a sweet dish served harshly tastes bitter. On the contrary, we enjoy a bitter medicine served nicely by a nurse. Never ever leap to your conclusions. There are always neutralizing factors, which must not be ignored.
Scientific work is always painfully slow but it is always richly fruitful.
Captain Arpetigny, who fought many battles under Napoleon, spent many hours to coordinate his results of the study of hands. Napoleon believed in palmistry. So did Hitler. A palmist, like a painter, brings his insight into play. Without insight one cannot become perfect in any science or art.