This Mystical Life of Ours - Classic Self Improvement Book by Ralph Waldo Trine
When one awakes from sleep and so returns to conscious life, he is in a peculiarly receptive and impressionable state. All relations with the material world have for a time been shut off, the mind is in a freer and more natural state, resembling somewhat a sensitive plate, where impressions can readily leave their traces. This is why many times the highest and truest impressions come to one in the early morning hours, before the activities of the day and their attendant distractions have exerted an influence. This is one reason why many people can do their best work in the early hours of the day.
But this fact is also a most valuable one in connection with the moulding of every-day life. The mind is at this time as a clean sheet of paper. We can most valuably use this quiet, receptive, impressionable period by wisely directing the activities of the mind along the highest and most desirable paths, and thus, so to speak, set the pace for the day.