The Lord spoke through the prophet Hosea reminding Israel of His love and how He had brought them out of Egypt. Yet, here He used the phrase “my son,” which made the verse not only a reminder of God’s expressed love in the past, but also His intended manifestation of love in the future. For this is one of many Messianic prophecies fulfilled in Christ, showing God’s love in sending His Son (John 3:16).
The gospel of Matthew quoted this verse from Hosea when recounting the Christmas story. For it was fulfilled when Joseph obeyed the angel’s instruction to carry Jesus to Egypt to avoid Herod’s murderous plan and then to return after Herod’s death (Matt. 2:15).
The Bible is primarily about God. It is a love story and Christ is its lead character.