JOT/ JYOTI
Jot literally: 1. light; in Sikh philosophy it means knowledge and wisdom 2. Flame.
Jyoti-Jyot Milauna
It means merging light (spiritual knowledge) into someone else, just as Guru Nanak merged his Jot (spiritual knowledge and wisdom) into Guru Angad Sahib and the same was done by the succeeding Gurus. Here merging knowledge with means imparting one’s knowledge to his follower or successor.
Jyoti-Jyot Samaanaa
Literally: merger of light with/into light.
Death has been referred to as Jyoti-Jyot Samaanaa (to merge light into Light, i.e. merger of spirit into Supreme spirit, i.e. to merge with God).
Jyot in Gurdwara
The burning of a torch or flame in a Gurdwara is not the ‘Jot’ of Gurbaani. In earlier times, when electricity had not been invented, a Jot (lamp) was lighted Gurdwaras. Burning of any Jot (or lamp), for purposes other than light (emergency light), is against Sikh ideology.
(Dr Harjinder Singh Dilgeer)