It is an extremely important topic, it is the purpose of our creation, as explained clearly in the Qur’an:
“It is Allah Who has created seven heavens and of the earth the like thereof (i.e. seven). His Command descends between them (heavens and earth), that you may know that Allah has power over all things, and that Allah surrounds (comprehends) all things in (His) Knowledge.” 65:12
Likewise, the statement of Allaah:
“And I (Allah) created not the jinns and humans except they should worship Me (Alone).” 51:56
The first verse dealing particularly with the category of “Ruboobiyyah”. The second with the category of “Uloohiyyah”. It is a blessing from Allaah to allow us to study these categories, as how many have been misled from this understanding from the disbelievers and even from the innovated groups of the muslims.
Tawheed linguistically is to single out and make something one.
Shirk linguistically is to make partners in something. It is the opposite of Tawheed.
The categories are 3:
1) Tawheed Ar Ruboobiyyah – To single out Allaah in His Lordship
• To believe and know He is the Creator of all things and the One who is in control of all affairs.
2) Tawheed Al Uloohiyyah – To single out Allaah in His Worship
• To believe that Allaah alone is the One worthy of Worship in Truth. This is the meaning of the Kalimah (Laa Illaaha Illa Allaah).
3) Tawheed Al Asmaa’ Was Sifaat – To single out Allaah in His Names and Attributes
• To believe in everything that has come from the Qur’an and Authentic Ahadith connected to the Names and Attributes of Allaah. We affirm that which He affirms for Himself in a manner that is befitting. This means not to distort the meanings, nor render them futile, nor ask how, nor liken them to creation.
For more detailed notes, visit learnaboutislam.com. BaarakAllaahu Feekum.