What is more revealing about these men is that at first they do not impress us as being key men. none of them occupied prominent places in the Synagogue, nor did any of them belong to the Levitical priesthood. for the most part they were common laboring men, probably having no professional training beyond the rudiments of knowledge necessary for their vocation. Perhaps a few of them came from families of some considerable means, such as the sons of Zebedee, but none of them could have been considered wealthy. They had no academic degrees in the arts and philosophies of their day. Like their Master, their formal education likely consisted only of the Synagogue schools. Most of them were raised in the poor section of the country around Galilee. Apparently the only one of the twelve who came from the more refined region of Judea was Judas Iscariot. By any standard of sophisticated culture then and now they would surely be considered as a rather ragged aggregation of souls. One might wonder how Jesus could ever use them. They were impulsive, temperamental, easily offended, and had all the prejudices of their environment. In short, these men selected by the Lord to be His assistants represented an average cross section of the lot of society in their day. Not the kind of group one would expect to win the world for Christ.
And I will ask the Father, and He will give you another Helper, that He may be with you forever; that is the Spirit of truth, whom the world cannot receive, because it does not behold Him or know Him, but you know Him because He abides with you, and will be in you. I will not leave you as orphans; I will come to you (John 14:16-18).
But you shall receive power when the Holy Spirit has come upon you, and you shall be My witnesses both in Jerusalem, and in all Judea and Samaria, and even to the remotest part of the earth (Acts 2:8).