Mark 5:43 — And he charged them straitly that no man should know it; and commanded that something should be given her to eat.

Why does Jesus tell Jairus and those with him not to broadcast the news of his daughter’s return from the dead?
Matthew Henry makes a strong case: “He charged them straitly, that no man should know it. It was sufficiently known to a competent number, but he would not have it as yet proclaimed any further; because his own resurrection was to be the great instance of his power over death, and therefore the divulging of other instances must be reserved till that great proof was given: let one part of the evidence be kept private, till the other part, on which the main stress lies, be made ready.” Jesus’ own resurrection was to be the first, and greatest, demonstration of His power over death — even though He could not forbear to exercise it in so touching a case as that of Jairus’s daughter.
It is strong case, but surely not complete — because there are other cases to consider. There was the leper whom Jesus told to conceal His healing, and tell only the priest to whom it must be reported.
Then there is the evidence of Matthew 12:16-19. Multitudes flocked to Jesus, and he healed many, but told them not to make their healing known. Matthew quotes Isaiah to account for Jesus’ instructions. “He shall not strive, nor cry; neither shall any man hear his voice in the streets.” Kehl and Delitzsch comment beautifully on this: “Although he is certain of His divine call, and brings to the nations the highest and best, His manner of appearing is nevertheless quiet, gentle, and humble; the very opposite of those lying teachers, who endeavoured to exalt themselves by noisy demonstrations. He does not seek His own, and therefore denies Himself; He brings what commends itself, and therefore requires no forced trumpeting.”
Jesus’s humility undoubtedly was part of this mystery. But there is one other thought, clarified by Myra this morning. There is an old idiom, “seeing is believing”. It’s said to be based on Thomas’s inability to believe in Jesus’s resurrection until he had seen Him. Jesus’s response was telling, and surely reflects on our question: “Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed.” (John 20:29) That was the point Myra made. Jesus wants us to believe first, and then see — not see first and then believe. “Now faith is the substance of things hoped for, the evidence of things not seen.” (Hebrews 11:1)