Four Hundred Texts on Love (Third Century) 32

71.  The passion of love, when reprehensible, occupies the intellect with material things, but when rightly directed unites it with the divine. For the intellect tends to develop its powers among those things to which it devotes its attention; and where it develops its powers, there it will direct its desire and love. It will direct them, that is to say, either to what is divine, intelligible and proper to its nature, or to the passions and things of the flesh.

We become like that toward which we direct our nous. At least, that’s how I understand St. Maximos here. Or, to put it a different way, we become like what we worship.