R Zelig Pliskin Gateway to Happiness P. 286
It is the nature of wise men to appreciate questions on their viewpoints more than agreement (Kovetz Igros Chazon Ish vol. 1 p. 152)
A person who wants approval is disturbed and irritated if someone questions his attitudes and opinions. But a wise man seeks truth and therefore feels pleasure if someone raises objections since this helps him correct his mistakes.
Shalom and Regards,