Philemon 1:16 points out that brotherhood and slavery is fully capable of going hand in hand. I would want other to give me a million dollars, it's not a command for other people to give me a million dollars. It's a command of love.
Now lets read this in full context and do please explain how this has anything to do with slavery.
10 I beseech thee for my son Onesimus, whom I have begotten in my bonds:
11 Which in time past was to thee unprofitable, but now profitable to thee and to me:
12 Whom I have sent again: thou therefore receive him, that is, mine own bowels:
13 Whom I would have retained with me, that in thy stead he might have ministered unto me in the bonds of the gospel:
14 But without thy mind would I do nothing; that thy benefit should not be as it were of necessity, but willingly.
15 For perhaps he therefore departed for a season, that thou shouldest receive him for ever;
16 Not now as a servant, but above a servant, a brother beloved, specially to me, but how much more unto thee, both in the flesh, and in the Lord?
17 If thou count me therefore a partner, receive him as myself.
18 If he hath wronged thee, or oweth thee ought, put that on mine account;
19 I Paul have written it with mine own hand, I will repay it: albeit I do not say to thee how thou owest unto me even thine own self besides.
