Since Islam is the last message, it deals with all aspects of life’s affairs. The Quran is the basic source of Islamic teachings and laws, and deals with the basis of creeds, morality, worship, man’s relation with God, and human relationships in all aspects. Social justices, economics, politics, are all important contents.
In addition, thousands of sayings and actions of the last Prophet (pbuh) have been meticulously reported and collected, and are graded as to their authenticity by sciences of transmission. Thesehadeethare the second source of divine law and support the Quran, making the message whole and complete.
Consequently as Muslims (lit: "those who surrender to God"), we are obliged to invite all mankind to this final message, which has been perfected, and we bear witness that God has completed his favour to mankind.
Only by submitting to the Commands of the Creator and Sustainer can one achieve real happiness and peace!
"This day have I perfected your religion for you and completed My favour unto you, and have chosen for you as religion Al-Islam."
"O mankind! Now has a proof from your Lord come unto you, and We have sent down unto you a clear light."