Waves originate in the upper layers of the sea. They are caused by the wind, so the wind can be said to have that power. So too, the mind of the intelligent person is full of thoughts and opinions. When the proper atmosphere is present, these spring up and roll in from all directions. In the same manner, the Lord is manifest in the picture or image that one worships, but is this due to any special excellence of the picture or image? No. The picture or the image remain as they are. The fact is that on account of the intensity of the devotion of the devotee, the Lord cannot desist from manifesting Himself for them. For that reason, He assumes - in stone, wood, or paper - the form that the devotee contemplates and meditates upon and worships. In order to fulfill the yearning of the devotee, the Immanent Basic Being of the Universe, will come in any Form, in anything, at any place.(Dharma Vahini, Chap IX.)