In business activities, a business ethics can maintain a good business rules, far from being greedy and selfishness, so that the business as a mediator in the form of a loving community with each other. In business, both parties have required adequate capacity to conduct business transactions. This includes the ability to distinguish good and bad, and not under duress and did not have the assumption that there is the right to vote. God forbid to do business directly with the weak reason. In surat Al-Baqarah verse 282: If the borrower is not strong or weak reason (it) or he himself could not mengimlakkan, then let his guardian mengimlakkan honestly.
Weak reason people can come from God and those who are weak because of what human reason itself. The weak reason because it comes from God, such as a lunatic, idiot, fainting, sleep, pain and death. Crazy can occur because there is brain damage caused due to depression. Crazy can eliminate a person's ability in the sense he was carrying out his task, so that all activities undertaken by it could be null and void and vain, no trace at all. Obligation to pay zakat on his property is not contradictory, but bear dirusakannya goods. However, be accountable to the guardian.
Idiot is a weakness of the intellect because of the weakness of consciousness and perception. Idiot does not eliminate the ability to think on the whole, but reduced capacity to think. All the activities of these idiot people who identified with the activities of a small child who has reason. During the activity merely useful, it can still be allowed, but if the activity is dangerous, it is considered null and void. If sometimes useful and sometimes harmful, depending on the law guardian.
Meanwhile, sleep and eliminate unconscious competence with a perfect duty, because the barometer is a reasonable competence. Sleep and eliminate unconscious mind and prevent the ability to choose. However, sleeping and fainting does not diminish the responsibility of breaking things.
God also forbade to do business directly with people who are not perfectly understand. In a letter of An-Nisaa 'verse 5-6: And do not leave it to people who have not perfect reason, the property (those who are in your power) which God made the subject of life. Give them shopping and clothing (from the results of the treasure) and speak to them words of good. And test the orphans until they are old enough to marry. Then if they think tealah intelligent (smart maintain property), then yield to them the treasure-treasure. And do not feed the orphan's property more than the limit of the fit and (do not) in a hurry (spending) before they mature. Whoever (among the keepers that) able, he should refrain (from consuming the orphan's property) and if any poor: then he ate it, according to property worth. Then when you leave property to them, you should invent the witnesses (of surrender) for them. And enough is Allah as a Supervisor (the testimony).
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