Passage
Which thou hast prepared before the face of all people;
Which thou hast prepared before the face of all people;
Luke 2:29 Lord, now lettest thou thy servant depart in peace, according to thy word:
Luke 2:30 For mine eyes have seen thy salvation,
Luke 2:31 Which thou hast prepared before the face of all people;
Luke 2:32 A light to lighten the Gentiles, and the glory of thy people Israel.
Luke 2:33 And Joseph and his mother marvelled at those things which were spoken of him.
The verse centers on "thou", "hast", "prepared", "before", "face", and "people". It is saying that the verse draws attention to "thou" and "hast", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 30's "For mine eyes have seen thy salvation..." into verse 32's "A light to lighten the Gentiles and...", so "thou" and "hast" 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 "hast" with trust shaped by these words, not by a vague optimism outside the passage.