Revelations of the Heart

A man plants a dozen fruit trees in his yard. After a few years most of the trees are producing fruit – apples, pears, cherries and peaches. After a few more years this owner is very happy with most of his trees which produce enough good fruit for his family and friends. However, there are two trees that have caused him great distress. One tree had never produced anything except leaves. The other produces loads of pears, but they taste so bad no one has been found that could eat more than one bite. He has done every thing possible to help the trees get better. He has pruned them, fertilized them, watered them, kept the pests off them, and has even tried products like fruit set and foliar fertilizers, but all to no avail. The one tree produces nothing, and the other only inedible fruit. What should he do with them?