Centering Prayer is a form of Christian meditation that leads to contemplation, a silent way to let God work in us. This ancient method of prayer is described at the Contemplative Outreach web site, which contains many rich resources.
Invitation to Love, by Thomas Keating is my synopsis of the book.I came to you late, O Lord. For you were within me but I was outside myself, and sought you there. You were with me when I was not with you. You called and cried and burst my deafness. You gleamed and glowed and dispelled my blindness. You touched me, and I burned for your peace. For you yourself have made us, and our hearts are restless until they rest in you. I came to you late, Beauty ever old and ever new. You have broken my bonds apart; to you I will offer up an offering of praise. St. Augustine