Hi Matt, not only are human beings inferior to the angels by nature as you say, for the angels are a more perfect creature by nature as they resemble God more perfectly than we do since they are pure spirits, but in the order of grace human beings are not necessarily higher than the angels either. The good angels partake in the divine nature with the same gift of grace that we do, namely, sanctifying grace. Accordingly, depending on the degree of sanctifying grace and charity we die with, we may be higher or lower than a particular angel in heaven. I think a person would have to die with an extraordinary degree of grace, charity, and holiness to be higher than, for example, the cherubim and seraphim which choirs of angels are the attendants at God’s throne. I, for one, do not see myself surpassing the sanctity of the cherubim or seraphim; not saying that it might not be possible for we should all strive for sanctity and holiness. Though, out of humility I don’t think we should think that we are definitely going to surpass the cherubim and seraphim or even many other of the lower choirs of angels. Jesus Christ, of course, is higher than all the angels even in his humanity since he is God and man. Our Blessed Mother’s holiness is also higher than all the angels, indeed, higher than any other pure creature God has created. The good angels have never sinned. We, on the other hand, are born with original sin on our souls and we commit many personal sins daily. Again, sanctifying grace does not make us higher than the good angels for they also possess sanctifying grace which makes them partakers of the divine nature and of eternal beatitude. The higher order choirs of angels possess a higher degree of grace than the lower orders of choirs according to God’s designs in creating the nine choirs of angels. They all are eternally happy to the full for they all see God face to face.