As for truth it endureth and is always strong, it liveth and conquereth for evermore.--Esdras. Everything happens according to the will of God and has its appointed time, which can neither be hastened nor avoided.--Mohammed. In the paper of the Rev. H. W. Watson, on "The Progress of Science, its Conditions and Limitations," he tells us that every thinking man recognizes the subjective Self and the objective non-Self, and that this non-Self, so far as it manifests its existence through the senses, is the object of investigation of natural philosophers; but he admits that their investigations have not bestowed upon modern science any results to justify the language of causation. Universal gravitation is declared to be a vast generalization, telling us that there is no more, but yet just as much, of mystery in the whole sequence of astronomical phenomena, as in the most humdrum processes of every-day experiences. The unfamiliar has been explained by the familiar, and both remain in their original mystery. The mystery, attendant upon gravitation, Kepler prophesied would be revealed to man in this age: and the cautious and inductive investigations which Keely has been pursuing, since 1888, have enabled him to demonstrate that the unknown force, which for fifteen years had baffled all his skill, is the same condition of sympathetic vibration which controls nature's highest and most general operations:--the identical force which Faraday divined when he wrote, in 1836: "Thus, either present elements are the true elements, or else there is the probability before us of obtaining some more high and general power of nature even than electricity, and which at the same time might reveal to us an entirely new grade of the elements of matter, now hidden from our view and almost from our suspicion."