When Yahshua healed the blind man and asked him what he saw he said that he saw men walking as trees (Mrk 8:24)!  Know and understand that people are a type of tree, this has been understood by many throughout history, hence our arms and legs are called limbs and our back the trunk and elsewhere in Scripture we're often depicted as trees in Scripture e.g. (Psa 1), (Mat3:10), etc.  Yet those of us called to be saints are called to be fruitful trees bearing spiritual fruit e.g. Love, joy, peace, etc.