Τhere is no eternal "rest"

Letters Of Helena Roerich II, 11 October 1935. 1. In reality, man cannot rid himself completely of karma, for karma is life. But the fulfillment of a cycle of karma, of whatever duration, depends upon our spiritual growth, and also on the mission we have undertaken upon a certain planet. This means that, having acquired a certain knowledge of the Teaching, and after an interval of time (a vacation, so to say), we have to commence the next, higher degree, and so on ad infinitum. These "vacations" may be that very place of rest, where there are no "tears or sighs." But no vacation continues forever, though it may be prolonged for thousands of years, therefore there is no eternal "rest."