Sometimes it’s useful to butt heads.
Quotes to consider:
“Honest disagreement is often a good sign of progress.” – Mahatma Gandhi
“Just as war is freedom’s cost, disagreement is freedom’s privilege.” – Bill Clinton
“The beginning of thought is in disagreement , not only with others but also with ourselves.” – Eric Hoffer
“There is nothing more likely to start disagreement among people or countries than an agreement.” – E. B. White