...there are some qualities that befit creatures in greater or lesser degrees in such a way that no imperfection is implied; such as unity, goodness, and truth. And with such qualities, the highest degree is to be attributed to God to whom every perfection is fitting. There are other qualities that involve some perfection together with imperfection, such as mobility which involves a certain actuality together with possibility. And because of the imperfection inherent in such qualities, they cannot and ought not be attributed to God in the proper sense, neither in the superlative degree nor in any lesser degree.
[Bonaventure, Disputed Questions on the Mystery of the Trinity (6.1 ad 2), Hayes, tr., Franciscan Institute (St. Bonaventure, NY: 2000), p. 232. Without looking up the Latin, I'm assuming that 'possibility' here should be 'potentiality'.]