They rest not day and night. Revelation 4:8.
O blessed rest! When we rest not day and night, saying, "Holy, holy, holy, Lord God Almighty!"—when we shall rest from sin, but not from worship; from suffering and sorrow, but not from joy! O blessed day, when I shall rest with God; when I shall rest in knowing, loving, rejoicing, and praising; when my perfect soul and body shall together perfectly enjoy the most perfect God; when God, who is love itself, shall perfectly love me, and rest in His love to me, and I shall rest in my love to Him; when He shall rejoice over me with joy, and joy over me with singing, and I shall rejoice in Him!—Baxter.