('saint-soldier'). Terminology The majority of Sikh scriptures were originally written in the alphabet of Gurmukhī, a script standardised by Guru Angad out of Laṇḍā scripts historically used in present-day Pakistan and North India. Adherents of Sikhism are known as Sikhs, meaning 'students' or 'disciples' of the Guru. The English word Sikhism derives from the Punjabi verb Sikhi, which connotes the "temporal path of learning" and is rooted in the word ('to learn'). Philosophy and teachings Sikhism is classified as an Indian religion along with Buddhism, Hinduism, and Jainism. The basis of Sikhism lies in the teachings of Guru Nanak and his successors. Sikh ethics emphasize the congruence between spiritual development and everyday moral conduct. Its founder Guru Nanak summarized this perspective as: "Truth is the highest virtue, but higher still is truthful living." Sikhism lays emphasis on Ėk nūr te sab jag upjiā, 'From the one light, the entire universe welled up.' Teachings Sikhism is a monotheistic religion with pantheistic elements, advocating the belief in One Universal God signified by the term Ik Onkar. In Sikhism, the overall concept of God is Waheguru ('wondrous Teacher') considered to be nirankar ('shapeless'), akal ('timeless'), karta purakh ('the creator'), and agam agochar ('incomprehensible and invisible'). In a literal sense, God has no gender in Sikhism, though metaphorically, God is presented as masculine and God's power as feminine. For example, God is repeatedly referred to by the name akaal purkh ('beyond time and space') and nirankar ('without form') by the tenth guru Guru Gobind Singh Ji, but he also refers to God as his father, and God's creative power as his mother. Similarly, another example is that the scripture and eternal guru, the Guru Granth Sahib says that all humans are soul-brides who long to unite with their husband Lord. In addition, the gurus also wrote in the Guru Granth Sahib that there are many worlds on which the transcendental God has created life. The Sikh scripture begins with God as ik onkar (), the 'formless one', understood in the Sikh tradition as monotheistic unity of God. Ik onkar (sometimes capitalized) is more loosely rendered 'the one supreme reality', 'the one creator', 'the all-pervading spirit', and other ways of expressing a diffused but unified and singular sense of God and creation. The traditional Mul Mantar goes from ik onkar until Nanak hosee bhee sach Guru Nanak (the first guru of Sikhs) is living forever.