witness to the truth of God (John 14:6). beginning of God’s creation. This corrects a heresy, apparently present in Laodicea as in Colossae, that Christ was a created being (cf. Col. 1:15–20). Instead, he is the “beginning” (lit., “beginner, originator, initiator”) of creation (cf. John 1:3) and the “firstborn of creation”; that is, the most preeminent, supreme person ever born (Col. 1:15). As a man, he had a beginning, but as God, he was the beginning. Sadly, this heresy concerning the person of Christ had produced an unregenerate church in Laodicea.

Crossway (2010-08-10). ESV MacArthur Study Bible (Kindle Locations 141838-141843). Good News Publishers/Crossway Books. Kindle Edition.

The church began through the ministry of Epaphras, while Paul was ministering in Ephesus (cf. Col. 1:7; Paul never personally visited Laodicea). the Amen. A common biblical expression signifying certainty and veracity (cf. Isa. 65:16, “the God of truth”). According to 2 Cor. 1:20, all the promises of God are fulfilled in Christ; that is, all God’s promises and unconditional covenants are guaranteed and affirmed by the person and work of Jesus Christ. faithful and true witness. He is a completely trustworthy and perfectly accurate...

Crossway (2010-08-10). ESV MacArthur Study Bible (Kindle Locations 141834-141838). Good News Publishers/Crossway Books. Kindle Edition.

Just a clarification on Rev 3:14...Jesus is the 'beginning' but he was not created... (John 1 is a good reference)

REVELATION—NOTE ON 3:14 angel. The pastor-messenger designated to deliver this letter (see note on 1:20). Laodicea. Located in the Lycus River Valley, the southwest area of Phrygia, Laodicea became the wealthiest, most important commercial center in the region. It was primarily known for three industries: banking, wool, and medicine (notably its eye salve). An inadequate local water supply forced the city to build an underground aqueduct. All three industries, as well as the inadequate water supply, played a major part in this letter.