Why is Christmas joyous? Because Christ came to forgive us our sins, to die carrying out own death sentence so that we might be freed from it. The problem of sin, which dogged humanity from the beginning of time, was finally solved.
Picture source: animationguildblog at blogspot
Every Christmas narrative in the Bible contains the command: Do not be afraid. The angel says it to Joseph, to Mary, to Zachariah.
Don’t be afraid of God. He is loving. The commands of the Old Testament are satisfied in the New Testament through Jesus. Christmas is, in the words of the angel, “good news of great joy” because God is forgiving the sins of all who ask. The gap separating man from God is bridged by the cross. Reconciliation is possible. Perfect love drives out all fear — 1 John 4:18 NIV.
God loves you with a perfect love. All you need to do, as with a Christmas present, is open it.