Luke 10:41-42

But the Lord replied to her, “Martha, Martha, you are worried and bothered and anxious about many things; but only one thing is necessary, for Mary has chosen the good part (that which is to her advantage), which will not be taken from her.  

Mary is sitting at the feet of Jesus and listening to the word.  Martha is working, worried and anxious, and not listening to the word coming from Jesus.  The word of Jesus takes away our fears and anxieties, had Martha put aside her troubles and listened to Jesus, her burdens could have easily been lifted.  Our circumstances can change when we make better choices.