Passage
And thou shalt have joy and gladness; and many shall rejoice at his birth.
And thou shalt have joy and gladness; and many shall rejoice at his birth.
Luke 1:12 And Zacharias was troubled when he saw [him], and fear fell upon him.
Luke 1:13 But the angel said unto him, Fear not, Zacharias: because thy supplication is heard, and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
Luke 1:14 And thou shalt have joy and gladness; and many shall rejoice at his birth.
Luke 1:15 For he shall be great in the sight of the Lord, and he shall drink no wine nor strong drink; and he shall be filled with the Holy Spirit, even from his mother`s womb.
Luke 1:16 And many of the children of Israel shall be turn unto the Lord their God.
The verse centers on "thou", "shalt", "gladness", "shall", "rejoice", and "birth". It is saying that the verse draws attention to "thou" and "shalt", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 13's "But the angel said unto him Fear..." into verse 15's "For he shall be great in the...", so "thou" and "shalt" 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 "shalt" with trust shaped by these words, not by a vague optimism outside the passage.