Martha sent for Jesus. She knew where he was. He dragged his feet for two days before coming (John 11:6) and her brother Lazurus died.
Martha knew it was Jesus‘ ‘fault‘. She said ‘Lord, if you had been here, my brother would not have died.’
Wouldn’t a more ordinary Martha have said ‘What in God's name took you so long?!’
Instead, she said: “Yet even now I know that whatever you ask God for, God will give you.”
John 11 is the go-to place if you are trying to explain the condition of the dead and the resurrection. I like that you can read a long passage and discuss it as you go; you don’t have to cherrypick here and there. It is always better if you don't have to hop around.
I learn something more each time I read the chapter, and I never noticed this little item about both Martha’s temperament and faith before.