Guru Nanak Sahibs Ji’s pathway of Gursikhi starts with 1 (one). This decision could have only been taken by proving the ideas of two, or anything above two as insignificant. In order to survive on Guru Nanak Sahib Ji’s unique path, every Sikh must be able to criticize, discuss and be capable of having logical debates. If they cannot contend with this, they will not be able to gain the true knowledge that Sikhism has to offer. 

The idea is that you become one with that True One God, and then understand that throughout this universe, there are over two trillion galaxies (as per NASA’s 2016 report) and within those two trillion galaxies, we live in one galaxy the Milky way. In the Milky way there are thousands of planets and we live on one called earth. On earth there are over 190 different countries, and you live in one. In that country we have one house, and even within that house you generally have around 3 or more different family members. So from having such a small existence within the universe, we should realise that each person is equal, and that we should see that God residing inside each person.

At the start of Guru Granth Sahib Ji, Sikhism is separated from all other religious through the Mool Mantar

Anmant	Gurbani	Gurmat
People pray to thousands of gods, and over 330 million demi-gods, demi-goddesses and angels.	ੴ Ik Onkar	Waheguru is only One, who is omnipresent, all-powerful and resides within all beings.
The many different man-made names for God will last as long as this world remains, after which names such as Govind, Narayan, Raghunath, Jagannath, Jagdish, Gopal, Rishikesh, Mukand etc will also disappear.	ਸਤਿਨਾਮ Sat Naam	Waheguru’s name is a complete truth. It remains eternal in an ever-changing world and exists before the world begins, while the world exists and long after the world will be destroyed.
According to mythology, Brahma, Vishnu, and Shiva are the ones that are capable of creating, sustaining, and destroying the world.	ਕਰਤਾ ਪੁਰਖੁ Karta Purakh	Only the one true Waheguru is capable of creating, sustaining and destroying the world.
In the stories of the thousands of gods and over 330 million demi-gods, demi-goddesses and angels, there are instances where they show that they fear one another.	ਨਿਰਭਉ  Nirbhau	Only Waheguru is capable of being without fear because there is no one else like him. The world creation operates under Waheguru’s fear and his commands.
The thousands of man-made gods, and over 330 million demi-gods, demi-goddesses and angels are famous for their stories of hatred with other demi-gods that they fought with. Those jealous deities curse each other and try to boost their own ego by showing each other up.	ਨਿਰਵੈਰੁ Nirvair	Waheguru has no hatred with anyone because Waheguru forsakes no one. Waheguru is free from enmity and only does what’s best for everyone.
The thousands of man-made gods and over 330 million demi-gods, demi-goddesses and angels follow the cycle of birth, life and death, making them the same as any other human being.	ਅਕਾਲ ਮੂਰਤਿ Akaal Moorat	Only Waheguru is Timeless, who is free from the cycle of birth, life and death.
The thousands of man-made gods, and over 330 million demi-gods, demi-goddesses and angels are all born from a woman’s womb and have a physical birth.	ਅਜੂਨੀ Ajooni	Waheguru has no birth and is not born from any woman, any egg, or any other life form.
The thousands of man-made gods, and over 330 million demi-gods, demi-goddesses and angels were all created from living people, and not self-created.	ਸੈਭੰ Saibhang	Only Waheguru has manifested from himself. He is self-created and is self-sustained. There is no other that can create him.
According to mythology, the one who has the understanding of all the different demi-gods, demi-goddesses and angels is told through Brahman.	ਗੁਰ ਪ੍ਰਸਾਦਿ Gur Prasaad	The understanding of the all-powerful and all knowledgeable Waheguru is with the true Guru, the Shabad Guru, Dhan Dhan Sri Guru Granth Sahib Ji.