in truth, a person is incapable of pure truth – for every desire we have causes us to lie – for example, the Bible says "a judge must never accept a bribe, for bribery alters the mind of the judge"- there was once a great Rabbi who was a judge and before the court-case, one of the litigants offered him some fruit – though he refused to take it, additionally he reclused himself from adjudicating, but he watched the proceedings – Lo and behold, he found his mind find winning arguments in the case, for the person who even wanted to bribe him! – As we are addicted to pleasure, hence as we know from addiction, the person who has an addiction, his mind validates, justifies and does everything to convince the person that he is doing what is noble and good – this is why, just as there are positive addictions, there are negative; for example, when people are angry hence jealous, they become addicted to sadism