The play oedipus opens with the following speech by oedipus: "my children, generations of living / in the line of kadmos, nursed at his ancient hearth: / why have you strewn yourself before these altars / in supplication, with your boughs and garlands? / the breath of incense rises from the city / with a sound of prayer and lamentation." what is oedipus’ attitude and tone in his speech?