伊朗尼(al-‘Imrānī)在抉擇之書(The Book of Choices)中論及第九宮的道德與教育事項時,有以下敘述:
And let Mercury be of a good condition, made fortunate and strong. We even praise it that Mercury be aspecting the lord of the Ascendant, nor should the Moon be diminishing [her] course, nor descending from the apogee.
And so, with it decreasing from the apogee (or rather, the orbit), that which is left over from the sixth up to the seventh, is mediocre; but from the seventh to the twelfth, and from one up to the third, the worst.