Shaykh al Uthaymeen rahimahullaah said:
And likewise (from the most important of matters) also is abandonment of argumentation and disputing because argumentation and disputing are a door to blocking the correct path.
For argumentation and disputing incite a person to speak and try to support himself only; even if the Truth is made clear to him, you will find him either rejecting it or else twisting it in a detestable manner, seeking to support himself and trying to force his opponent to take his statement.
So if you see argumentation and disputing from your brother, in that the Truth (in that matter) is something clear but he does not follow it, then flee from him as you would flee from a lion. And say, “I don’t have anything except this (information which I have told you)” and leave him…
So from those matters of importance for the student of knowledge is that he leave off argumentation and disputing and that he leave off those ideas which come to his mind; leave these matters and do not be obstinate. Make your knowledge be something simple and easy – meaning (like) the Arab who came, he came upon his camel and asked the Prophet sall Allaahu ‘alaihi wa sallam about matters of the Religion, then he (the Arab) departed without arguing because he had nothing with him except tasleem (submission).
As for arguing and disputing and quarreling then this is something that harms the person.
(Sharh hilyah taalib il ‘ilm p19 to 20 of Shaykh Muhammad ibn Saalih al ‘Uthaymeen rahimahullaah. Translated by Nasser ibn Najam)