Read Hebrews 5:5-10
5In the same way, Christ did not take upon himself the honour of being a high priest. Instead, God said to him:
“You are my Son;
today I have become your Father.”
“You will be a priest for ever,
in the priestly order of Melchizedek.”d
7 In his life on earth Jesus made his prayers and requests with loud cries and tears to God, who could save him from death. Because he was humble and devoted, God heard him. 8But even though he was God’s Son, he learnt through his sufferings to be obedient. 9When he was made perfect, he became the source of eternal salvation for all those who obey him, 10and God declared him to be high priest, in the priestly order of Melchizedek.e
The writer to the Hebrews quotes Jeremiah (yesterday's reading about the law being written on our hearts) in chapter 8. This reading is the beginning of the Hebrew's description of the kind of priest Jesus is - one who brings about real change through his sacrifice - and not just symbolic change.
Jesus - thank you for your faithfulness through which you change my heart.
5 5.5: Ps 2:7
6 5.6: Ps 110:4
d in ... Melchizedek; or like Melchizedek; or in the line of succession to Melchizedek.
7 5.7: Mt 26:36–46; Mk 14:32–42; Lk 22:39–46
e in ... Melchizedek (see 5:6).