Muhammad worked all his life with utmost sincerity for the well-being of his fellow men. He spent all his time, his resources, and his energies on guiding the ignorant people of Arabia to the light of Islam. He was busy day and night in his mission for the betterment of humanity and suffered at the hands of the very people whom he was endeavoring to save from the fire of Hell. He was worried about the plight of the people, who were living in complete ignorance and evil and did not know what was good or bad for themselves. He wanted to save them from a life of evil and misery and bring them to the ways of goodness and piety. Sometimes he felt sick and hurt at their bitter remarks and strong opposition but never lost hope or gave way. God often tried to comfort him on such occasions:
"Follow not the wishes of the disbelievers and the hypocrites, and ignore their persecution and put your trust in God." [Qur'aan 33:48]
At Makkah, he went from house to house to every family and gave them the Message of God with great compassion, love and sincerity as their well-wisher, but in return they showered abuses upon him. He did pot lose heart but continued to encourage them to the path of goodness. On another occasion God comforted him in these words:
"We know indeed the grief which their words cause you; it is not you they reject, it is the Signs of God which the wicked condemn."
Then in Surah Al-Ma'idah we read,
"O Messenger, grieve not because of those who rush into disbelief from among those who say with their tongues. 'We believe', but whose hearts believe not." [Qur'aan 5:42]
The Messenger of God, in spite of abuses and persecution, continued to invite people to the Light of Islam. He laboured day and night in his struggle to bring them to the Truth merely for the Pleasure of God. He never asked them for any kind of compensation or remuneration,
"Say! No reward do I ask of you for this except love as between kindred."
[Qur'aan 42:23] And in Surah Sad we read,
"Say! No reward do I ask of you for this, nor am I a Pretender." [Qur'aan 38:86]
When he first gathered all his kinsmen on the mount of Safa, in obedience to the Command of Allah, he addressed them saying: "O people of the Quraish! If I were to tell you that an army was steadily advancing from beyond these hills, would you believe me?" All of them answered with one voice, "Yes, we have always found you honest, sincere and truthful." Then he explained to them in very simple words the doctrine of Tawhid and invited them to Islam and warned them of the evil consequences of their disbelief. No one paid any heed to his sincere and honest message. Some of them, including Abu Lahab, his uncle, abused him but he tolerated everything and continued his sincere efforts for the good of the people. Muhammad struggled all his life, through thick and thin, for the welfare of the people. He never gained anything materially, socially or politically. He had the good of the people at heart and spent all his life to achieve this in the light of the Revelation of God. All his life, he struggled hard and sincerely for the good of the people without ostentatious pride. A cursory glance at his character will show his immense sincerity for the Mission assigned to him by God. And an impartial observer hardly fail to notice, from almost every incident of his life, his sincere efforts for the betterment of humanity. Above all, this struggle was not for his financial gain or worldly glory but for the Glory of God and the welfare of the people