There is only one God, he is the Creator, Sustainer and Destroyer.
"You are the Creator, O Lord, the Unknowable. You created the Universe of diverse kinds, colours and qualities. You know your own Creation. All this is your Play." (Guru Nanak, Var Majh)
"The Formless Supreme Being abides in the Realm of Eternity. Over His creation He casts His glance of grace. In that Realm are contained all the continents and the universes, Exceeding in number all count. Of creation worlds upon worlds abide therein; All obedient to His will; He watches over them in bliss, And has each constantly in mind." (Guru Nanak, Japji)
God cannot take human form.
"He neither has father, nor mother, nor sons nor brothers." (Guru Nanak, Maru)
"Burnt be the mouth that asserts, the Lord takes birth. He is neither born nor dies; neither enters birth nor departs. All pervasive is Nanaks Lord." (Guru Arjan Dev, Raga Bhairon)
The goal of human life is to break the cycle of birth's and deaths and merge with God. This can be accomplished by following the teachings of the Guru, meditation on the Holy Name and performance of acts of service and charity.
The five cardinal vices are; Kam (lust), Krodh (anger), Lobh (greed), Moh (worldly attachment) and Ahankar (pride). If one can overcome these, they will achieve salvation.
"Five thieves who live within this body are lust, anger, greed, attachment and ego. They rob us of ambrosia, but the egocentrics do not understand it and no one listens to their cries" (Guru Amar Das, Sorath)
Sikhism rejects all distinctions of caste, creed, race or sex.
The Sikh Holy Book (Guru Granth Sahib) is the perpetual Guru, there is no place in Sikhism for a living Guru today.
Honest labour and work (Kirat Karna) are the approved way of living ones life. It is considered honourable to earn ones daily bread through honest work and not by begging or dishonest means
Vand Chhakna, sharing with others is also a social responsibility. The individual is expected to help others in need through charity
Seva, community service is also an intergral part of Sikhism. The free community kitchen (langar) found at every gurdwara and open to people of all religions is one expression of this community service.