Complex sentence: While Paul does not explicitly state that slavery should be abolished, the trajectory seen in Scripture is a progressive liberation of slaves (granting liberties, etc.), which, when extended to today, implies that the Biblical witness supports the abolition of slavery.
Split into simpler sentences: While Paul does not explicitly state that slavery should be abolished, the trajectory seen in Scripture is a progressive liberation of slaves. When this is extended to modern times, it implies implies that the Biblical witness supports the abolition of slavery.