A pure devotee's body although made up of matter, but because of being in contact with the spirit, the body is spiritual.
The living entities are not actually meant to be under the control of the modes but when they reject Krishna then they become affected by the three modes of material nature and as a result of that they identify themselves with the material nature.
I feel very happy when people come up to me and tell me that all devotees are so nice and devotees take so much of care. This attracts people to temple.
The symptom of a Vaishnava is trinad api sunicena taror api sahisnuna, that's the perfect definition of a Vaishnava. Another consideration is that a Vaishnava is a surrendered soul to Krishna.