Recently, a patient told me that she gave her daughter a homeopathic remedy called Thuja, made from the arbor vitae plant. I asked “is it for warts?” “Yes” she responded. How did you know? “I guessed it because I knew of the “law of signatures”.
Wikipedia states :
‘The doctrine of signatures is a philosophy shared by herbalists from the time of Dioscurides and Galen. This doctrine states that herbs that resemble various parts of the body can be used to treat ailments of that part of the body.”
Thuja has clusters of small wart-like growths on its stems. It helps cure warts. Ginseng is a tonic and energizes the whole body.
If you look at the root of the plant, it resembles a “little man”. 
Saw palmetto helps the prostate.
Does this look a bit like the shape of the prostate gland? There are many other examples. 
During this discussion, the patient suddenly announced “ G-d leaves a stamp on things”.
From now on lets take a look around us and begin looking for divine signatures in our daily lives. What a stamp collection!