According to higher systems of thought (In Hindu System) , every object in the Universe is a manifestation of God, and therefore might be or ought to be worshipped.
The Upanishads recommend the worship of the mother, the father, the teacher and the guest (particularly, at Lunch time in olden India; even now by few)
If any particular Guru happens to be possessed of noble virtues or of siddhis, superhuman or extraordinary powers, then he is worshipped more naturally and readily not only by the mass, but by the intelligentsia and the critics.
"I draw to Me, My man from far off or even across the seven Seas to Shirdi, like a sparrow with a string fastened to its feet"-Shirdi Sai Baba, Indian Spiritual Guru-God 