Jamieson, Fausset and Brown on Mark 5:36

36. he saith unto the ruler of the synagogue, Be not afraid, only believe--Jesus, knowing how the heart of the agonized father would sink at the tidings, and the reflections at the delay which would be apt to rise in his mind, hastens to reassure him, and in His accustomed style: "Be not afraid, only believe"--words of unchanging preciousness and power! How vividly do such incidents bring out Christ's knowledge of the human heart and tender sympathy! (He 4:15).