Prayer choreography: during the “Amidah” prayer, one is instructed to bow at the beginning and end of the “Avot” (Patriarchs – we add Matriarchs]) and the “Hodaha” (Thanksgiving). That’s it – if you want to bow more often, you are instructed not to. However, according to Rabbi Joshua ben Levi, a Kohen bows at the end of each benediction. A king bows at the end and the beginning of each benediction.
The principle seems to be: the greater the position the more the person is humbled in prayer. I like this idea of imposing increasing humility – not professing it, but actually doing something physical which demonstrates it. Everyone is humble before G-d - some need it more than others.
A person without humility is described as a “dish without salt.” But someone who over-states their humility is compared to a dish which is over-salted. Even in our humility, we need to be properly seasoned!