The hymns in Guru Granth Sahib gives out a message that all castes should be treated equally, women should be a given a high status. It also spreads holistic message as well as believes in the concept of Universal Human hood. Jaidev who was a Hindu Brahmin has written some hymns. He denounces wealth and beauty and lay emphasis on meditation of God. He says:

Ramu simaru pachutahiga mana.
Pdpl jlard lobhu karatu hai dju kali uthi jdhiga.
Lalaca Idge janamu gavdld bharam bhulahiga.
Dhana jobana kd garabu na kljai kdgada jiu gall jdhiga.
Jaujamu di kesa gahi patakai ta kina kchu na basdhiga.
Simaranu bhajanu daid nahl k`inl tau mukhi cotd khdhigd.

Baba Farid who practiced Islam has also penned some hymns. Some of his verses are given below and it emphasizes on forgiveness and God can help us out in every situation.
He says:
Pharldu jo toi mdrni mukldn tinhan na mare ghunmi.
Adpanarai ghara jalai pdira tinan di cumin.
Phardd jdn tau khatan vel ran tu ratd dunl siu.
Mdrag svdl nlhi jan bharid tan ladid.
Dekhu pharldu jo thla ddrl hoi bhura Agahu nerd did picha rahia duri.
Dekhu pharidu ji thla sakara hoi visit.
Sanl bdjhhu apani vedan kahlai kisu.

In the opening of Guru Granth Sahib Guru Nanak has made a basic statement of his faith which has become the fundamental statement in relation to creed for the Sikhs known as Mool Mantra, which is:
Ik Orhkdr Satinamu Karta purakhu Nirbhau Nirvlru Akdl-murati Ajuni Saibhang Gurprasddl.
Guru Nanak has prescribed some ways to achieve salvation:
Adi sacu Jugddi sacu
Hai bhi sacu
Nanak hosl bhi sacu
Socai soci na hovai je soci lakh vdr.
Cupai cup na hovai e lal rahd liv tar.
Bhukhid bhukh na utrlje bannd puna bhdr.
Sahas sidnpd lakh hohi ta ik na calai ndli

Kabir who was a weaver, Ravidas who was a cobbler and Namdev who was a dyer by profession has also penned down some Hymns. Namdev condemns the treatment meted out to him on his first visit to a Hindu temple. He narrated this experience thus:

Hasata khelata tere dehure aid.
Bhagati karata ndmd pakare uthaid.
Hlnarjdti men jddama raid.
Chipe ke janami kdhe ku aid.
Lai Kamall caleo palatal.
Dehurai pdchai baithd jdi.
Jiu jo ndmd hari gun ucarai.
Bhagata janan kau dehura phirai.

One of the well known verses of Kabir in Guru Granth Sahib is as follows:

Gagan Damama Baajooh pariho nishaan-e-ghao,
khet jo maandyo surma aab jujhan ka tao,
Sura so pahchaniye jo lare deen ke het,
purja purja kate marhe kabho na chhade khet.