Since God is said to have answered Moses, there is an implication that the sound contained intelligible speech. Philo of Alexandria, a first century Jewish theologian, makes the element of intelligible speech explicit in his description of the theophany. He states that God manifested Himself in a great sound: [G]iving shape and tension to the air and changing it to a flaming fire, [there] sounded forth like the breath through a trumpet an articulate voice so loud that it appeared to be equally audible