1 Corinthians 8:2

8:2 If someone thinks he knows something, he does not yet know to the degree that he needs to know.

1 Corinthians 10:12

10:12 So let the one who thinks he is standing be careful that he does not fall.

1 Corinthians 12:22

12:22 On the contrary, those members that seem to be weaker are essential,