The Altar and the Priest
Just as the Altar represents God Almighty, the priest represents the servant of the Most High. The high priest in the Tabernacle and, later, in the Temple, symbolized the Chief Servant: Jesus Christ. The Messiah came to serve God the Father and those who would come to follow Him.
Now, if the Son of God was a Servant until death, bearing the curse of sin of all humanity, and because of this, He had to learn obedience(serve) by the things He suffered(Hebrews 5.8), imagine the quality of service that God the Father expects from His servants!
God the Son served as an example or reference of Servant for all His disciples. Therefore, no one can have an excuse for not knowing how to serve God the Father.
And He took bread, gave thanks and broke it, and gave it to them, saying, “This is My body which is given for you; do this in remembrance of Me.” Likewise He also took the cup after supper, saying, “This cup is the New Covenant in My blood, which is shed for you. Luke 22.19-20
When the Lord broke the bread and gave it to the disciples, He served them; the same way, when He gave them the cup, He also served them. This means: He did not serve only with words, but with sacrificial acts.
The same should happen with His true followers. Otherwise, there will be no relationship between these “supposed servants” and the LORD. This is why He also said:
“Not everyone who says to Me, ‘Lord, Lord,’ shall enter the kingdom of heaven, but he who does the will (serve) of My Father in heaven. Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’ And then I will declare to them, ‘I never knew you; depart from Me, you who practice lawlessness!’ Matthew 7.21-23