How can a book that tells you how to treat slaves possibly be valid moral guide

[Drich]

what an evasion drich. We are not slaves. The bible endorses slavery. Why doesn't the bible say that slavery is wrong?

Actually the bible says we are all slaves to one master or another. Jesus said we can't serve two masters we will love the one and hate the other... Paul Identifies us as slaves to sin. If you do not think yourself a slave to sin then simply stop. You can't because you are indeed a slave.

Maybe you should look up the word to better understand it. Slave does not mean a chained black man in a field picking cotton. It is a universal term. a slave is one who's will is subject to another person or even in this case a force. this defination encompasses your idea of a slave and every other idea of a slave as well. now keep that in mind.

So again your question why did God put rules in the bible governing slavery? 1 because we are all slaves to one degree or another. Couple this with the understanding that it is with the same measure we use against others it will be used against us. we will see or begin to understand that the rules to slavery in the OT aren't about what the master can get away with but about the perservation of the one in servitude. the limits (if followed) then become our upper limits of what we are made to endure.

Lets see if you get this before we go any further.