Meditation is the activity of calling to mind, and thinking over, and dwelling on, and applying to oneself, the various things that one knows about the works and ways and purposes and promises of God.
It is an activity of holy thought, consciously performed in the presence of God, under the eye of God, by the help of God, as a means of communion with God.Its purpose is to clear one’s mental and spiritual vision of God and to let His truth makes its full and proper impact on one’s mind and heart.
J.I. Packer
From the book “Knowing God”