Worshipping Allah alone is the purpose of creating jinn and humankind and the way to save oneself from Hell and win Paradise. In this hadith, the Prophet ﷺ explains the virtue of monotheism for those who die while believing in it. He said that if one dies while believing in Allah's oneness, worshiping none but him, acting upon the Islamic knowledge, performing the Islamic pillars that the Prophet came with such as prayer, fasting, zakah, pilgrimage, and all acts of worship and goodness, and refraining from evil acts, he will enter Paradise in the hereafter with Allah’s mercy. On the other hand, if he committed sins, Allah would reckon him as He, the Almighty, wills then he would enter Paradise. This is the doctrine of Ahlussunnah. In addition, knowledge is the opposite of ignorance which made this nation neglect the meaning of monotheism testimony. If one ignores its meaning, he will definitely contradict it whether by sayings, deeds, or beliefs. The method to know this testimony is by the following points: (1) Pondering over Allah’s names, attributes, and deeds, (2) Knowing that Allah is the only one who creates and manages his universe so he is worthy of worship alone, and (3) Knowing that Allah is the only one who grants people the obvious and hidden blessings in this world or the hereafter, which makes our hearts love, worship, and cling to Allah, without any partner. The greatest way to achieve these points is to ponder over the Noble Quran, for it is the best method to learn about monotheism. By pondering this great Book, one gets lots of benefits that he cannot get from any other method. A Muslim has to deeply learn about monotheism, for it is the key to Paradise but each key has teeth. Knowledge is one of its teeth that is a prerequisite for making one’s faith useful and accepted..