Why did Christ appoint these sacraments?
To distinguish His disciples from the world, and to comfort and strengthen them.
Matthew 28:18-19a And Jesus came up and spoke to them, saying, "All authority has been given to me in heaven and on earth. Go therefore and make disciples of all the nations, baptizing them."
1Corinthians 11:23a, 26 For I received from the Lord that which I also delivered to you....For as often as you eat this bread and drink the cup, you proclaim the Lord's death until He comes.