Some details pertinent to the successive 
stages of Revelation:

Before we go into the details of the period of communicating the Message and Prophethood, we would like to get acquainted with the stages of the Revelation which constituted the main source of the Message and the subject-matter of the Call. Ibn Al-Qayyim, mentioning the stages of the Revelation, said:

The First: The period of true vision. It was the starting point of the Revelation to the Messenger of Allaâh .

The Second: What the angel invisibly cast in the Prophet’s mind and heart. The Messenger of Allâah said: "The Noble Spirit revealed to me ‘No soul will perish until it exhausts its due course, so fear Allâah and gently request Him. Never get so impatient to the verge of disobedience of Allâah. What Allâah has can never be acquired but through obedience to Him.’"

The Third: The angel used to visit the Messenger of Allâah in the form of a human being and would speak to him directly. This would enable him to fully understand what the angel said. The angel was sometimes seen in this form by the Prophet’s Companions.

The Fourth: The angel came to him like the toll of a bell and this was the most difficult form because the angel used to seize him tightly and sweat would stream from his forehead even on the coldest day. If the Prophet was on his camel, the camel would not withstand the weight, so it would immediately kneel down on the ground. Once the Messenger of Allâah had such a revelation when he was sitting and his thigh was on Zaid’s, Zaid felt the pressure had almost injured his thigh.

The Fifth: The Prophet saw the angel in his actual form. The angel would reveal to him what Allâah had ordered him to reveal. This, as mentioned in (Qur’ân), in Sûrah An-Najm (Chapter 53 - The Star), happened twice.

The Sixth: What Allâah Himself revealed to him in heaven i.e. when he ascended to heaven and received Allâh’s behest of Salât (prayer).

The Seventh: Allâh’s Words to His Messenger at first hand without the mediation of an angel. It was a privilege granted to Moses (AS) and clearly attested in the Qur’ân, as it is attested to our Prophet in the Sûrah Al-Isrâ’ (Chapter 17 - The Journey by Night) of the Noble Qur’ân.

Some religious scholars added a controversial eighth stage in which they state that Allâah spoke to the Prophet directly without a curtain in between. This issue remains however unconfirmed. 

Proclaiming Allâh, the All-High; and the Immediate Constituents

The first Revelation sent to the Prophet implied several injunctions, simple in form but highly effective and of serious far-reaching ramifications. The angel communicated to him a manifest Message saying:

"O you (Muhammad ) enveloped (in garments)! Arise and warn! And your Lord (Allâh) magnify! And your garments purify! And keep away from Ar-Rujz (the idols). And give not a thing in order to have more (or consider not your deeds of Allâh’s obedience as a favour to Allâh). And be patient for the sake of your Lord (i.e. perform your duty to Allâh)!" [74:1-7]

For convenience and ease of understanding, we are going to segment the Message into its immediate constituents:

1. The ultimate objective of warning is to make sure that no one breaching the pleasures of Allâh in the whole universe is ignorant of the serious consequences that his behaviour entails, and to create a sort of unprecedented shock within his mind and heart.

2. ‘Magnifying the Lord’ dictates explicitly that the only pride allowed to nourish on the earth is exclusively Allâh’s to the exclusion of all the others’.

3. ‘Cleansing the garments and shunning all aspects of abomination’ point directly to the indispensable need to render both the exterior and interior exceptionally chaste and pure, in addition to the prerequisite of sanctifying the soul and establishing it highly immune against the different sorts of impurities and the various kinds of pollutants. Only through this avenue can the soul of the Prophet reach an ideal status and become eligible to enjoy the shady mercy of Allâh and His protection, security, guidance and ever-shining light; and will consequently set the highest example to the human community, attract the sound hearts and inspire awe and reverence in the stray ones in such a manner that all the world, in agreement or disagreement, will head for it and take it as the rock-bed in all facets of their welfare.

4. The Prophet must not regard his strife in the way of Allâh as a deed of grace that entitles him to a great reward. On the contrary, he has to exert himself to the utmost, dedicate his whole efforts and be ready to offer all sacrifices in a spirit of self-forgetfulness enveloped by an ever-present awareness of Allâh, without the least sense of pride in his deeds or sacrifices.

5. The last verse of the Qur’ân revealed to the Prophet alludes to the hostile attitude of the obdurate disbelievers, who will jeer at him and his followers. They are expected to disparage him and step up their malice to the point of scheming against his life and lives of all the believers around him. In this case he has got to be patient and is supposed to persevere and display the highest degree of stamina for the sole purpose of attaining the pleasure of Allâh.

The Prophet managed quite successfully to rise to his feet and measure up to the new task, he went ahead in a spirit of complete selflessness, relentlessly striving and never abating in carrying the burden of the great Trust, the burden of enlightening mankind, and the heavy weight of the new faith and strife for over twenty years, nothing distracting his attention from the awesome commission. May Allâh reward him, for us and all humanity, the best ending. The following research at hand gives an account in miniature of his long strive and uninterrupted struggle he made after receiving the ministry of Messengership.