There was a difference before and after Pentecost; after Pentecost the Holy Spirit came to indwell.
least to the greatest...
Jeremiah 6:13-16
[13] For from the least of them even unto the greatest of them every one is given to covetousness; and from the prophet even unto the priest every one dealeth falsely. [14] They have healed also the hurt of the daughter of my people slightly, saying, Peace, peace; when there is no peace. [15] Were they ashamed when they had committed abomination? nay, they were not at all ashamed, neither could they blush: therefore they shall fall among them that fall: at the time that I visit them they shall be cast down, saith the Lord . [16] Thus saith the Lord , Stand ye in the ways, and see, and ask for the old paths, where is the good way, and walk therein, and ye shall find rest for your souls. But they said, We will not walk therein .
Acts 8:9-10
[9] But there was a certain man, called Simon, which beforetime in the same city used sorcery, and bewitched the people of Samaria, giving out that himself was some great one: [10] To whom they all gave heed, from the least to the greatest, saying, This man is the great power of God.
Hebrews 8:10-13
[10] For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people: [11] And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest. [12] For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more. [13] In that he saith, A
new covenant , he hath made the first old. Now that which decayeth and waxeth old is ready to vanish away.
John 8:7-9
[7] So when they continued asking him, he lifted up himself, and said unto them, He that is without sin among you, let him first
cast a stone at her. [8] And again he stooped down, and wrote on the ground. [9] And they which heard it , being
convicted by their own conscience, went out one by one, beginning at the eldest, even unto the last: and Jesus was left alone, and the woman standing in the midst.
Least to greatest passes away: in Christ there is one body of many members joined and fitted together by His flesh and bone. Neither Greek nor Jew...neither circumcision nor uncircumcised but rather all made one in Spirit.