The people of Thamud perfected the art of construction. They were definitely well versed in related branches of knowledge, for example, mathematics, geometry and engineering, otherwise such development could not have been possible. But they were held guilty not of material developments but of spreading disturbance on the earth. This means that God does not prohibit progress within legitimate limits. But, in the matter of how he conducts his life, man should follow the balanced system which God has enforced in the whole universe. When a prophet comes to the world, he is a controversial figure in his time rather than an established personality. Moreover, he is not surrounded by worldly glories. He is not the occupier of any of the important seats of the time. That is why his contemporaries, unable to understand his prophethood, reject him. They find it difficult to believe that one whom they know as an ordinary person is the very individual whom God has chosen to deliver His message. ‘We are believers in that with which he has been sent.’ This reply of Salih’s companions tells us the difference between them and others. Those who deny the truth looked at the personality of Salih while the believers looked at the real message. Since, for those who denied the truth, no outward glory surrounded the personality of Salih, they ignored him. The believers, on the contrary, saw glimpses of Truth in Salih’s message, so they immediately accepted his words and became his companions.