Luke 9:43

43 All the people were amazed at the mighty power of God. The people were still marveling at everything Jesus was doing, when he said to his disciples,

Luke 9:43 Meaning and Commentary

Luke 9:43

And they were all amazed at the mighty power of God
Or at "the greatness", or "majesty of God"; which was displayed in this cure: for the great power of God was manifestly seen in it, to the astonishment of the disciples, who could not cure this child, and of the parent and friends of it, and of the whole multitude: and to the confusion of the Scribes and Pharisees:

but while they wondered every one, at all things which Jesus did;
and were applauding him for them, and speaking in his praise on account of them:

he said unto his disciples;
privately, when they were alone together, the following words, that he might not seem to be lifted up with the praise of men; and also to show their inconstancy, that those who, now admired him, would one day crucify him; and to take off the thoughts of the disciples from a temporal kingdom and glory, they were so much in expectation of, and which every miracle of Christ, and the applause he got thereby among men, strengthened them in.

Luke 9:43 In-Context

41 Jesus answered, "How unbelieving and wrong you people are! How long must I stay with you? How long do I have to put up with you?" Then he said to the man, "Bring your son here."
42 As the boy was coming, the demon knocked him to the ground and threw him into a fit. Jesus gave a command to the evil spirit, healed the boy, and gave him back to his father.
43 All the people were amazed at the mighty power of God. The people were still marveling at everything Jesus was doing, when he said to his disciples,
44 "Don't forget what I am about to tell you! The Son of Man is going to be handed over to the power of human beings."
45 But the disciples did not know what this meant. It had been hidden from them so that they could not understand it, and they were afraid to ask him about the matter.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.