Psalm 15:2 He that walketh uprightly, and worketh righteousness, and speaketh the truth in his heart.
David asks a rhetorical question in v. 1: Who will abide and dwell in God’s tabernacle or holy hill? In other words, who will live in God’s Presence? The answer is: The person who lives right, does good works, and tells the truth.
The believer in Christ lives his life in the presence of God, and the living God is with him and in him. However, truth be told, we are not and cannot be righteous before God and thus cannot come into His Presence. He cannot live with our sin and we can’t abide in His Holiness. But God in the Grace of Christ takes away our sin and grants us His righteousness. Then we can abide on His Presence.
Father loves us, Son died for us, and Spirit lives in us. We live, move, and walk in the Presence of God, and our life looks like Love. Jesus earns righteousness and graces us with the right and privilege to come before God. We live and breathe out of that source of life, the Holy Spirit in our spirit. He comes out in what we say and how we say it. The truth in the heart is this: I am not; Jesus is.