1 Corinthians 1:9 (AV)
9 God is faithful, by whom ye were called unto the fellowship of his Son Jesus Christ our Lord.
If there is one characteristic of God that appears over and over throughout scripture, it is his faithfulness: God is faithful. Yet, it is the characteristic of God we most often forget; when we do we worry and become anxious. When we face a trial in life we often forget God’s faithfulness and try to solve it on our own. God may use that trial as a means to call us into a particular ministry or mission. Sometimes God calls us by our trials.
Young’s Literal Translation says through whom ye were called (not by whom as in NKJV, KJV, ESV). Why does it matter? Every believer is called through God, but the way each believer is called may vary.
That means everyone is called. Some are called by attending a missionary conference and by hearing the witness of a missionary speaker, some are called by hearing the word of God taught or by reading the word of God, etc. In other words God calls all believers by various means, he doesn’t call some and not others. So the call comes through God, but not by God–he uses other instruments to proclaim the Gospel.