Sin and death came into the world through one man, Adam, but grace and life come through the one Man, Jesus Christ (Romans 5:12). The Christmas story shows the Trinity accomplishing that rescue together: Joseph, son of David, is told not to fear taking Mary as his wife because what is conceived in her is from the Holy Spirit, and the power of the Most High overshadows her so that the child born will be called the Son of God (Luke 1:35; Matthew 1:20).
Behind that moment stands the Father’s eternal plan, chosen before the foundation of the world according to the kind intention of His will, that His people would be holy and blameless through Jesus Christ (Ephesians 1:3-14). Those who hear the word of truth and believe are sealed with the promised Holy Spirit, so that the whole work of Father, Son, and Spirit meets in the manger and continues in the life of every believer, summed up in the name Immanuel, God with us.