“And on the banks, on both sides of the river, there will grow all kinds of trees for food. Their leaves will not wither, nor their fruit fail, but they will bear fresh fruit every month, because the water for them flows from the sanctuary. Their fruit will be for food, and their leaves for healing.”
Ezekiel 47:12

1. The leaves will be for medicine.
2. There will be healing and preservation of life qualities about the very leaves which will cause human bodies to live on and on, without sickness and disease.
3. The properties in the leaves will no doubt renew the cells of the body and cause longevity.
4. The bodies of men will be perfectly healthy because of perfect nutrition--partaking of all the necessary minerals and vitamins