Page 53 - Complete Works of Dr. KCV Volume 1

It is perhaps well to remember that ancients had two paths - the path of the day and the path of the night (the latter path is well known as the pancharatra or the path of the five nights, whereas the former must have been known as the path of the five day-times). Divine evolution or creation proceeds by the path of the day-times whereas dissolution or laya proceeds by the path of the nights. Yoga as Nivrtti or return to the original Ultimate Being is, therefore naturally the path of the nights. Sri Krishna is indeed the teacher of this path of the five nights. We attach ourselves to the ultimate being in our thought which is in a sense identical with the original thought centering round the energy particle or soul which has become our body and our being. This connecting ourselves with the ultimate being is possible at the points or times of connection between the nivrtti and pravrtti, day and night tendencies or movements.
Thus the meditation on the ultimate is best made at the Sandhyas, and more especially at, the night sandhya. In fact, the master speaks of the necessity for prayer and meditation at bedtime. This time the Pancharatra calls the time of yoga and samadhi, which is the final portion of the five times it has set apart for worship. It is then that one connects oneself with the transcendent original state.
The coolness that one experiences in the return reveals that the heat (friction) that has entered into one is now going out and one is slowly returning to the heaven of peace which is the ultimate.
The practice of early rising is to help feel the refreshing oneness with God during the early period expressing itself in and through the day. It is possible to experience that coolness of laya, absorption, even during the day when the heat seems to be increasing. It is this that has to be remembered as the Karma in Akarma and Akarma in Karma, the quiet in action and action in the quiet, the living in the ultimate fully which develops sahaj samadhi, natural absorption, in the ultimate who verily is the source of both creation and dissolution. Thus one develops the vision of the transcendent.
Master has also suggested the connection between the seasons; as we have stated it refers to the moving of the earth round the sun and marks out the periods of heat and cold, expansion and contraction, manifestation and absorption.