In his letter to Philemon, Paul described Onesimus as his
Answer Details
In his letter to Philemon, Paul described Onesimus as his "child" (Philemon 1:10). This is a metaphorical use of the word, as Paul is referring to the fact that he led Onesimus to faith in Jesus Christ. By doing so, Paul became a spiritual father to Onesimus, and thus referred to him as his "child."