By Dr. Long,
Heare’s a snippet,
In 1 Thessalonians 2:4 Paul says he spoke to the congregation as someone who was approved by God to be entrusted with the Gospel. This is an important claim and is related to Paul’s apostleship.
First, Paul says he was “approved by God.” This verb (δοκιμάζω) has the sense of being tested for the purpose of determining the genuineness (BDAG). For example, an ore which appears to contain gold can be tested to determine if it is in fact gold as well as the quality of the gold. Only after the test is finished can the ore be described as real gold (as opposed to iron pyrite, fool’s gold). Paul is claiming he has been tested by God and has been given approval for his mission to the Gentles. Ironically, it is his suffering persecution for that is the “proof” he has been tested and approved!
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Source: Approved by God and Entrusted with the Gospel