Galatians 2:1-10, vs. “8 (for he who worked through Peter for his apostolic ministry to the circumcised worked also through me for mine to the Gentiles), 9 and when James and Cephas and John, who seemed to be pillars, perceived the grace that was given to me, they gave the right hand of fellowship to Barnabas and me, that we should go to the Gentiles and they to the circumcised.” ESV
Who we link arms with is very important because who we are, what we believe, what we stand for can partly be traced to those we link ourselves with. One popular example, in the last few years there has been a drive for unity for a common cause in many areas with Evangelical and Catholics Together (ECT).