Thou wilt show me the path of life. Jesus died for our sin, rose from the dead, and is alive for evermore, His resurrection from the dead was the first entrance out of the grave to eternal life. Yes, there had been several that had risen from the dead, but they all died again. We find the pathway to life out of the regions of death, where we will die no more!!
In thy presence is fullness of joy. I do not have words that are capable or proficient enough to describe what "being in the presence" of almighty God is like. However, when I connect with God, when I enter into His presence there is nothing else on my mind. Above all, "praise" begins to fall from my lips, and deeper still my heart is quieted in a "worshipful" aspect, where there is complete peace and joy that I just cannot explain.
At thy right hand there are pleasures forevermore: For me, the praise and worship I know here on earth... are just crumbs, little bits of heaven that give the joy I find in Christ my Lord! One day, those times of praise and worship will be our pleasure forevermore!! Truly, heaven's joys are without measure, mixture or end!!
NOTE: Joy is the infallible sign of the "Presence of God!"