A time for mourning //

And he began to teach them, that the Son of man must suffer many things, and be rejected of the elders, and of the chief priests, and scribes, and be killed, and after three days rise again. (Mark 8:31) Saying, The Son of man must suffer many things, and be rejected of the elders and chief priests and scribes, and be slain, and be raised the third day. (Luke 9:22) Saying, The Son of man must be delivered into the hands of sinful men, and be crucified, and the third day rise again. (Luke 24:7)

He told them. Time and again. He taught it to them. But they did not understand. 

some things you can hear but simply not understand without the Spirit.

They fought the crucifixion. They mourned his death. They couldn't comprehend the resurrection.

Mary poured out her life's worth on the Lord and He praised her for it, for preparing His body for burial (John 12:3-8) although He knew He would only be in the grave for three days. He had a very intentional final meal with His disciples (Luke 22:7-20) and then He was eating with them again days later. He prayed so earnestly out of His agony that He sweat blood (Luke 22:44). Mary Magdalene sat outside the grave and wept for the double loss, first of His life, but then of His body (John 20:11-15).

And then He rose. Just like He said He would. 

And the sincere mourning made the rejoicing so much sweeter.