Col 3:10 And have put on the new man, which is renewed in knowledge after the image of him that created him:
Col 3:11 Where there is neither Greek nor Jew, circumcision nor uncircumcision, Barbarian, Scythian, bond[doulos] nor free: but Christ is all, and in all.
If this is the case, then, why bond/servants/doulos in the following verses?
Col 3:22 Servants[doulos], obey in all things your masters according to the flesh; not with eyeservice, as menpleasers; but in singleness of heart, fearing God:
Col 4:1 Masters, give unto your servants[doulos] that which is just and equal; knowing that ye also have a Master in heaven.
In addition, the former is true and written, the latter is instruction also, for there will always be masters and servants. Always