140- The Effects of Exercise
I say that whichever part of the body one exercises, that specific area will be strengthened.
If you train and exercise your biceps, they will become strong. If you exercise your fingers, they too will be strengthened. If you exercise your eyes, they will be sharper; the power of speech will increase if you exercise your sense of talking. This notion is easily adaptable to other senses.
The twelfth sense that you mentioned is like this. If people train the right way, their sense of clairvoyance will strengthen.
Right now, such exercise has started around the world. According to this concept, humankind has become aware (somewhat) of the fourth dimension, the dimension of clairvoyance. However, humans have yet to comprehend and explain it adequately.