11 Now the constitution of human society does not allow, nor indeed do the words of our Lord's teaching permit, that the disciple should be above his master, or the slave rule over his lord; because, in these contrasted positions, subordination to knowledge is the fitting state of ignorance, and unconditional submission the appointed lot of servitude. And since it is the common judgment of all that this is so, whose rashness now shall induce us to say or think that God is a creature, or that the Son has been made? For nowhere do we find that our Master and Lord spoke thus of Himself to His servants and disciples, or that He taught that His birth was a creation or a making. Moreover, the Father never bore witness to Him as being anything else but a Son, nor did the Son profess that God was anything else than His own true Father, assuredly affirming that He was born, not made nor created, as He says, Every one that loves the Father, loves also the Son Who is born of Him.
Source: On the Trinity (New Advent)