A lawyer should endeavor to obtain full knowledge of his client's cause before advising thereon, and he is bound to give a candid opinion of the merits and probable result of pending or contemplated litigation. The miscarriages to which justice is subject, by reason of surprises and disappointments in evidence and witnesses, and through mistakes of juries and errors of courts, even though only occasional, admonish lawyers to beware of bold and confident assurances to clients, especially where the employment may depend upon such assurance. Whenever the controversy will admit of fair adjustment, the client should be advised to avoid or to end the litigation.