Most evangelical Christians identify Luke — the companion of the apostle Paul — as the most likely author of the Gospel of Luke (and therefore the material in Luke 1:46–47, 49, the opening lines of Mary’s Magnificat).

Key points evangelicals usually offer:

– Who Luke was
– Referred to in the New Testament as a close associate of Paul (Philemon 1:24; Colossians 4:14; 2 Timothy 4:11). Early church tradition (e.g., Irenaeus) and the usage of “we” in parts of Acts point to a single author who traveled with Paul.
– Described by Paul as “the beloved physician” (Col. 4:14), which fits Luke’s polished Greek and attention to detail.
– Traditionally regarded as a Gentile Christian (the only New Testament writer often identified this way in the church fathers), writing with an interest in reaching Gentile readers.

– Why Luke is thought to be the author
– Internal evidence: Luke 1:1–4 states the author carefully investigated accounts and wrote an orderly narrative addressed to “Theophilus,” indicating an informed, investigative historian.
– Acts includes several “we” passages (Acts 16:10–17; 20:5–15; 21:1–18; 27:1–28:16) that suggest the author was an eyewitness or travel companion of Paul — matching the profile of Luke.
– External testimony from early Christian writers consistently attributes both Luke and Acts to Luke.

– How Luke likely recorded Mary’s words
– Luke 1:1–2 says he relied on eyewitnesses and carefully investigated reports. Evangelicals commonly hold that Luke either interviewed Mary (or other eyewitnesses close to the events) or used reliable oral testimony to preserve Mary’s song (the Magnificat).
– Luke shows particular sensitivity to women and marginalized people throughout his Gospel, which supports his inclusion and careful recording of Mary’s role and words.

– Luke’s perspective and emphases (relevant to the Magnificat)
– Luke stresses God’s care for the humble, the reversal of social fortunes, fulfillment of God’s promises to Israel, and the work of the Holy Spirit — themes prominent in Mary’s song (Lk 1:46–55).
– His medical/educated background and historian’s approach make him a careful reporter of both facts and theological meaning, valued by evangelicals for historical reliability and doctrinal trustworthiness.

– Date and audience (typical evangelical view)
– Written to “Theophilus” and intended as an orderly, apologetic history of Jesus (and then the church in Acts). Many evangelicals date Luke–Acts in the early 60s AD (some allow a wider range up through the 60s–70s), though exact dating is debated.

Recommended evangelical resources (if you want to read more)
– Darrell L. Bock, The Gospel of Luke (BECNT)
– Joel B. Green, The Gospel of Luke (NIGTC)
– F. F. Bruce, The Acts of the Apostles (commentary touches on Luke–Acts and authorship)

If you’d like, I can summarize how evangelical interpreters typically explain the theological meaning of Luke 1:46–47, 49 (the Magnificat) verse by verse.