No doubt there have to be differences among you to show which of you have God's approval. (1 Corinthians 11:19)
Wintertime mood disorder or Seasonal Affective Disorder as it is called, affects people in some countries. Those affected sleep more, gain weight and crave high carbohydrate foods, and tend to slow down and socially hibernate from late fall to early spring. But some get Seasonal Affective Disorder (SAD) in the summer. As hot weather approaches, those with summer SAD sleep less, eat less, and lose weight. They're extremely irritable and get angry.
People differ so much and in so many ways. Even believers in Jesus Christ are so different in their outlook towards life in general and even in their spiritual life. The Apostle Paul writing to the Church in Corinth mentions this specifically as we read in the title verse.
Believers there, were in a contest as of who would have the approval of God. So eventually there were divisions. He adviced them to be of one mind. So also while writing to the church in Philippi, he says,
If you have any encouragement from being united with Christ, if any comfort from his love, if any fellowship with the Spirit, if any tenderness and compassion, then make my joy complete by being like-minded, having the same love, being one in spirit and purpose. Do nothing out of selfish ambition or vain conceit, but in humility consider others better than yourselves. (Philippians 2:1-3)
We must remember as believers in Jesus Christ that there will be differences in the ways that we worship and serve him. But we should not look down on those who do not match up to our spiritual standards or are different in their approach towards their spiritual lives. Even if we think that anyone needs correction, let it all be done in love.