Rejection of the theory of ether is a natural consequence of the steady development of scientific thoughts conducted by scientists since1881. It is indeed true that the theory of ether was totally rejected only after the epoch-making discovery of the Special Theory of Relativity by Einstein in 1905. However, the ether theory was also rejected by Swami Vivekananda in 1895. But the same had gone unnoticed by the scientific community. After a gap of ten years, the theory was rejected by Einstein. The paper aims at unlocking the scientific insights hidden in the prognostication of Swami Vivekananda.