And as they followed they were afraid

Mark 10:32
Now they were on the road, going up to Jerusalem, and Jesus was going before them; and they were amazed. And as they followed they were afraid. Then He took the twelve aside again and began to tell them the things that would happen to Him:

As Jesus is approaching Jerusalem, the disciples were uneasy, even afraid as described above. By the Holy Spirit the disciples knew who Jesus is supposed to be but we know from the despair following the crucifixion, that they still did not fully comprehend His Mission at this time.

So the disciples sense imminent danger as they approached Jerusalem with their Master. They have walked, talked, eat, slept with Jesus for over three years. But now, their Master's intentions remains mysterious and scary.

On various occasions, we have seen that God does not intend to be mysterious to His people, especially those close to Him. He will reveal His plans to us. Although we may walk closely with Him, His purpose are still so much greater than ours. It is no wonder that after years of following Him, we may still find ourselves walking far behind. However, we know that He is our refuge and fortress, we need only to trust and obey.