What the Bible says about Mary and Martha's Faith
(From Forerunner Commentary)
Jesus and Martha were talking on two different levels. She understood in a way, but not what Jesus was really saying. Jesus was talking about a resurrection that would occur in just a few moments, while she meant a resurrection that will occur when God resurrect the firstfruits. They were speaking about the same subject, but their timing was off, so to speak.
John W. Ritenbaugh
Faith and Prayer