Ibn Hazam al-Andalusee (rahima-hullaah) mentions:

((Anyone who spends his time studying something inferior, abandoning higher studies of which he is capable, is like someone who sows corn in a field capable of growing wheat, or who plants bushes in a soil which could support palm trees and olives)).

al-Akhlaaq was-Siyar - Ibn Hazam al-Andalusee

Ref: Fatwa-Online

al-Haafidh Abu Haatim Muhammad ibn Hibbaan said:

"If you were to ever argue, be respectful and safeguard yourself from your own ignorance. Avoid being hasty and contemplate over your argument. Show the judge your forbearance, refrain from pointing a lot, shuffling your feet, reddening your face and sweating. If you are insulted by your adversary, be forbearing and only speak when calm."

Ref: A Righteous Predecessor Advises his Son ^Update!