Expositor's Bible Commentary Commentary 1 Corinthians 8:2

"If any man thinketh that he knoweth anything, he knoweth not yet as he ought to know;" — 1 Corinthians 8:2 (ASV)

Paul warns against dependence on simply knowing something, since a person never knows all that ought to be known about a subject. Such an attitude exhibits a complete dependence on one’s own self-sufficient knowledge and illustrates what Paul means by saying, “Knowledge puffs up [GK 5881].”