Psalm 15 is David’s description of the people who have fellowship with the Lord. He describes them with terms like upright, truthful, honoring, honest, generous, full of integrity. The result of these traits and practices are that this person will dwell in God’s tabernacle and on His holy hill. He shall never be moved.
Psalm 16 discusses the hope of the faithful in the Messiah. David begins by declaring his trust in God and the excellence of those saints who trust in Him. Those who follow other gods, though, will have sorrow. The Lord is the portion of his inheritance and the greatness of counsel. The steadfast nature of the Lord provides David with stability and gladness. He ends the psalm with the well-known Messianic passage:
Psalm 16:10–11 (NKJV)
10 For You will not leave my soul in Sheol,
Nor will You allow Your Holy One to see corruption.
11 You will show me the path of life;
In Your presence is fullness of joy;
At Your right hand are pleasures forevermore.
This passage is thought to refer to the resurrection of Christ prophetically, and gives the believer a sense of hope in the risen Lord who provides life, joy, and pleasure. Be a believer, Have fellowship with the Lord. Dwell with Him in a solid unmovable relationship. The risen Messiah is worthy of praise and He will be your source for all things good.