John Calvin Commentary Psalms 63:6

"When I remember thee upon my bed, [And] meditate on thee in the night-watches." — Psalms 63:6 (ASV)

I shall surely remember you, etc. It may also be read, when, or as often as, I remember you, I will pray in the night watches. But since the Hebrew particle used here is occasionally taken as an adverb of affirmation, as well as of time, I have adhered to the commonly received translation. In this case, his remembering God is to be understood as the same thing as meditating on Him, and the one clause just contains a repetition of the sentiment expressed in the other.

If the particle is taken in the different sense formerly mentioned, the words intimate that as often as the name of God recurred to his mind, he would dwell on it with pleasure and speak of His goodness. He particularly mentions the night watches, as, when retired from the sight of our fellow human beings, we not only revert to what may have given us anxiety, but feel our thoughts drawn out more freely to different subjects. We next have the reason assigned for the engagement or declaration he has just made, which is that he owed his preservation to God. The experience of divine goodness should dispose us to prayer as well as praise. As the Psalmist says in another place, I will come into Your house in the multitude of Your mercy (Psalms 5:7). The second part of the seventh verse is expressive of the lively hope with which he was animated. He was resolved to rejoice and triumph under the shadow of God’s wings, feeling the same peace and satisfaction in reliance on His protection as he would have felt if no danger had existed.