Rejoicing at Jesus's birth

I love Luke 1. Zacharias and Elisabeth and Mary all rejoice that their Lord will finally come. It's so sweet. It is neat to think back on all the centuries and how many people rejoiced because of the Savior. Now I feel like not very many really know Him. And therefore aren't experiencing the joy that knowing Him brings. I feel so privileged and blessed. And it makes me want to share my knowledge of Him with others and help them grow their faith in Him.