troubled (ταράσσω)
Look particularly at John 12:27:
“Now my soul is troubled, and what shall I say? ‘Father, save me from this hour’? No, it was for this very reason I came to this hour.
John 13:21:
After he had said this, Jesus was troubled in spirit and testified, “Very truly I tell you, one of you is going to betray me.”
But then in John 14:1-3:
Jesus was troubled. In John 14:1, he seems to be saying we should not be. I doubt very much that the lesson is it's OK to be troubled in soul or spirit but not in heart. How do you interpret these verses together?“Do not let your hearts be troubled. You believe in God; believe also in me. My Father’s house has many rooms; if that were not so, would I have told you that I am going there to prepare a place for you? And if I go and prepare a place for you, I will come back and take you to be with me that you also may be where I am.