When a machine is produced it is accompanied by a set of instructions for its use. An engineer is also commis¬sioned to give a practical demonstration of how the machine functions. Man is an even more intricately de¬signed but animate machine. When he is born, he suddenly finds himself in a world where no mountain bears an inscription answering questions concerning the nature of the world, or explaining how he should live on earth. No educational institution produces experts who know the secret of life or who can provide man with practical guidance.
To satisfy this need felt by man, God sent His prophets to the world, every one of whom brought with him the word of God. In the scriptures revealed to them, God has explained the reality of life to man, and has made it clear what man should and should not do. They showed man what sentiments and ideas he should adopt; how he should remember his Lord; how he should live with his fellows, what he should associate himself with and disassociate himself from. The prophets’ lives are a practical demonstration of how a person should live a God-fearing life.
God has given everyone the power to distinguish between right and wrong. He has also placed countless signs in space and on earth from which man can learn. Moreover, His revelations have been set down in human language and several of His servants chosen from amongst mankind as prophets, so that there should be no doubt as to the true path.