As they continued their journey he entered a village where a woman whose name was Martha welcomed him. She had a sister named Mary (who) sat beside the Lord at his feet listening to him speak. Martha, burdened with much serving, came to him and said, "Lord, do you not care that my sister has left me by myself to do the serving? Tell her to help me." The Lord said to her in reply, "Martha, Martha, you are anxious and worried about many things. There is need of only one thing. Mary has chosen the better part and it will not be taken from her." (Lk 10:38-42)
Mary and Martha were disciples of Jesus and they were also his friends. If they were not so close to him then Martha would not have complained to Jesus about her sister for not helping her. If they were not familiar and friendly then Mary would not have sat at his feet to listen to him. We do not complain to a stranger about our family problems and we do not (especially women) sit at the feet of a stranger.
The sisters were probably competing with each other to be with Jesus or at least to listen to him. Martha’s complain could have been that if Mary also helped her in doing the work then both could come together to listen to him. Martha also wanted to be a disciple of Jesus and wanted to learn from Jesus. Martha could only appeal to Jesus to let her sister help her.
Concern of many things and that too earthly thing are good. They are needed for the people of this world. But for the disciples of Jesus and for the people of the kingdom what was needed was listening to the word of God. For Jesus himself has said: Man does not live on bread alone but from every word of God.