Passage
`Now Thou dost send away Thy servant, Lord, according to Thy word, in peace,
`Now Thou dost send away Thy servant, Lord, according to Thy word, in peace,
Luke 2:27 And he came in the Spirit to the temple, and in the parents bringing in the child Jesus, for their doing according to the custom of the law regarding him,
Luke 2:28 then he took him in his arms, and blessed God, and he said,
Luke 2:29 `Now Thou dost send away Thy servant, Lord, according to Thy word, in peace,
Luke 2:30 because mine eyes did see Thy salvation,
Luke 2:31 which Thou didst prepare before the face of all the peoples,
The verse centers on "thou", "dost", "send", "away", "servant", "lord", "word", and "peace". It is saying that the verse draws attention to "thou" and "dost", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 28's "then he took him in his arms..." into verse 30's "because mine eyes did see Thy salvation...", so "thou" and "dost" belong inside that flow. In Luke context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "thou" and "dost" with trust shaped by these words, not by a vague optimism outside the passage.