The Greek in 2 Corinthians 6:12 that is often translated as «affection» in English is translated in Huba as «with one stomach.” This is a close match to the Greek original which uses splagchnon, the «inward part» or «bowels» to express the concept of affection. The English King James Version / Authorised Version translates here as «bowels.» (Source: David Frank in this blog post ).
See also Seat of the Mind / Seat of Emotions and maintain constant love for one another / love each other deeply.