It should be required that he make diligent inquiry as to the soundness of his opinions. Then, it should be evident that he has acted not for private gain but for the benefit of the people; so that it may conclusively appear that the law has not been made for any private or personal advantage, but for the protection and profit of the whole body of citizens. The framer of laws and the dispenser of justice should prefer morals to eloquence, that his speech may be characterized rather by virtuous sentiments, than by elegance of expression. He should be more eminent for deeds than for words; and should discharge his duties rather with alacrity than with reluctance, and not, as it were, under compulsion.

He should be mindful of his duty only to God and to himself; be liberal of counsel to persons of high and low degree, and easy of access to the citizens and common people; so that, as the guardian of the public safety, exercising the government by universal consent, he may not, for personal motives, abuse the privileges of his judicial office.

He should be energetic and clear of speech, certain in opinion; ready in weighing evidence, so that whatever proceeds from the source of the law may at once impress all hearers that it is characterized by neither doubt nor perplexity.

The Judge should be quick of perception; firm of purpose, clear in judgment, lenient in the infliction of penalties; assiduous in the practice of mercy; expeditious in the vindication of the innocent: clement in his treatment of criminals; careful of the rights of the stranger; gentle toward his countrymen. He should be no respecter of persons, and should avoid all appearance of partiality.

All public matters he should approach with patriotism and reverence; those concerning private individuals and domestic controversies he should determine according to his authority and power; so that the community may look up to him as a father, and the lower orders of the people may regard him as a master and a lord. He should be assiduous in the performance of his duties so that he may be feared by the commonalty to such a degree that none shall hesitate to obey him; and be so just that all would willingly sacrifice their lives in his service, from their attachment to his person and to his office.

Then, also, he should bear in mind that the glory and the majesty of the people consist in the proper interpretation of the laws, and in the manner of their administration. For, as the entire safety of the public depends upon the preservation of the law, he should attempt to amend the statutes of the country rather than the manners of the populace: and remember that there are some who, in controversies, apply the laws according to their will, and in pursuance of private advantage, to such an extent that what should be law to the public is to them private dishonor; so that, by perversion of the law, acts which are illegal are often perpetrated, which should obviously be abolished through the power of the law itself.

(http://www.autoadmit.com/thread.php?thread_id=5585939&forum_id=2#48035687)