"Do not let your hearts be troubled. Believe in God, believe also in me.  In my Father's house there are many dwelling places.  If it were not so, would I have told you that I go to prepare a place for you?  And if I go and prepare a place for you, I will come again and will take you to myself, so that where I am, there you may be also.

Jesus consoles his disciples who are evidently saddened after learning that Jesus will be going away (John 13.33)  "Do not let your hearts be troubled" indicates that we do have control over the anxiety which settles over us and this control comes from faith in Jesus, particularly faith that he is in heaven preparing a place for those who believe in him and will return to take us there.

"So that where I am you also may be."  Jesus wants us with him.  His desire is that we occupy the dwelling places in heaven he is personally preparing.  Meditating upon this, where then is anxiety?  Where weariness?  Where faint-heartedness, sluggishness, lack of perseverance?  Our temporal state here on earth is so short even by our own standards - mercifully so.  Our permanent state in heaven is what we eagerly await - a permanent state of being, outside of time, with Christ forever.  This is Christ's desire, and his desire is also that we keep his desire in mind.