So one reads 1 Corinthians 1:10 and comes away teaching that the family of God must be of the same "mind and judgment" on everything and the 'fun" begins. One brother believes Praise Teams are a sin...another that you cannot support orphan homes with "church money." Still another sister thinks the Spirit dwells only through the word while her husband believes in personal indwelling. The exchange of ideas and breadth of beliefs are myriad. Each believer believing their perspective is correct. In time, often, since the "same mind and judgment" cannot be found division occurs, communication stops and fellowship is withdrawn. Is that what Paul had in mind in the passage cited?
Read the passage again but do not take 1:10 out of context. Avoid turning it into a proof text. After Paul makes the comment, inspired by the Spirit I might add, he asks some questions: "Is CHRIST divided? Was Paul crucified for you? Were you baptized into the name of Paul? What is his point. the questions points all the divided brothers right back to Christ. Interestingly they were all baptized into the name of the one who died on the cross for them - Jesus Christ. He is the one about whom they are to speak the same thing and have the same judgment. He is the one in whom they put their trust. He is the one they hear. If we believers agree on Christ unity exists. Then we follow Paul's advice from 1 Cor. 8 when we still disagree on details but the basis for our unity remains intact. Good news again.!