It was not just Jesus’ prophecies of the rising from the dead or his statements about having come down from heaven that the disciples could not understand.
“Truly, truly, I tell you, he who doesn’t enter through the gate into the sheepfold, but climbs up at some other place, is a thief and a robber. He who enters through the gate is the shepherd of the sheep. The gatekeeper opens for him, and the sheep hear his voice, and he calls his own sheep by name and leads them out. And once he has driven out his sheep, he goes before them, and the sheep follow him because they know his voice. They will never follow a stranger, but they will flee from him because they don’t know the voice of strangers.” Jesus spoke this allegory to them, but they did not understand the things that he said to them.
Truths that we all now take for granted, people of Jesus’ time on earth had never dreamed of and could not imagine.
Be thankful. You live in an amazing time.