Which epistle emphasizes the importance of love and unity among believers in the Christian community?

Which apostle famously doubted Jesus' resurrection until he saw the wounds in His hands and side?

The period of the "Return from Exile" is associated with which Persian King's decree?

Which epistle contains the famous analogy of the Church as the "body of Christ" and the members as individual parts?

Which biblical passage is known as the "Lord's Prayer" and contains a model of prayer and guidance?