“The Lord has swornHebrews 7:21 quoting Psalm 110:4 (ESV)
and will not change his mind,
‘You are a priest forever.’”
God has for us a hope for me, a future for me, one involving a perfect high priest Jesus. He is immutable. One of the things that makes the future appetizing to me is that there is change from my present state to a better one. Most often I am hoping in a better situation in this present life and not the life to come. My focus is on change while in the end, God's future of hope is built on consistency which exists when there is perfection. Priests in the Old Testament Levitical system had to be replaced since they died. So in a sense, I am looking for something better, but my heart is not set on the perfect one, Jesus. Since he died for me, he loves me with a love that will not cease, he is worthy of all my focus and devotion.
For on the one hand, a former commandment is set aside because of its weakness and uselessness (for the law made nothing perfect); but on the other hand, a better hope is introduced, through which we draw near to God.-- Hebrews 7:18, 19 (ESV)
Christ's priesthood is the bases of my better hope, it is my optimism that is true. My future orientation should focus primarily on that which is perfect and not on that which is temporal.