An Islamic worker needs to know precisely what he is calling towards. Equally, he needs to know precisely the means he is going to use to carry out this task. A message cannot be conveyed without a means of conveyance. Therefore, anyone person who wishes to call someone else to an idea needs the following:
1. A purpose.The purpose of Islamic work is to call people to Allah, either to believe in Him or to obey Him. The Islamic worker is required to adhere to the dictates of Islamic Law in undertaking this task. He needs, therefore, to be cognizant of the fact that matters of Islamic Law can be broken down into two broad categories:
2. A means to achieve that purpose.
(1) Acts of worship. These are the means by which our welfare in the Hereafter is achieved. These ways are dictated to us by the sacred texts in their essentials and in all their details. Allah says: “Or do they have partners who established for them in their religion what Allah has not permitted?” [Sûrah al-Shûrâ: 21]
(2) Transactions and customs. These are the means by which human welfare is achieved in this world. They include all interpersonal relationships, contracts, commercial activities, and the like. The basic ruling that should be assumed for such matters is that of permissibility unless there is specific evidence to the contrary. The proof for this is that Allah says: “Say (O Muhammad): Have you considered the provision that Allah has sent down to you and that you have declared of it what is unlawful and lawful? Say (O Muhammad): Has Allah permitted you to do so or are you fabricating a lie against Allah?” [Sûrah Yûnus: 59]
On the basis of these principles, anyone who wishes to assert that something is an act of worship is required to produce evidence from the Qur’ân and Sunnah to show that it is. It is not necessary, however, for him to produce evidence demonstrating that a certain worldly transaction or activity is sanctioned. By contrast, he must produce evidence only if he claims that an activity is unlawful.