Sach Khand, or Sac Khand, ("The Realm Of Truth") is the Sikh concept of joining with God. It is achieved by the Guru's Grace and through Simran.

The term is also used for the room in a Gurdwara where the Guru Granth Sahib rests at night, and in the cosmology of Surat Shabd Yoga (Sound Meditation) as the home of souls.

Kashmir Singh (Punjabi: ਕਸ਼ਮੀਰ ਸਿੰਘ) (born 1941), who was an Indian spy, spent 35 years of his life in Pakistani prisons before he was released with the Presidential pardon by Pervez Musharraf.

In his early life, he was in he Indian Army from 1962-1966. After working in the Punjab Police for a while, he took up spying on a contractual basis at the rate of Rs. 400 per month. Thereafter, he entered Pakistan in the guise of Ibrahim, a Muslim name. Using this name, he checked into hotels and got identity cards during his task.

In 1973, he was arrested on the 22nd Milestone on the Peshawar-Rawalpindi road by Pakistani intelligence officers. Upon arrest, he was accused of espionage and smuggling but it could not be proved by the authorities. At the time of his arrest, his family included his wife, Paramjit Kaur, and three children under the age of 10.

Subsequently in the same year, he was sentenced to death by a Pakistan Army court. This verdict was upheld by a civil court in between 1976 and 1977 and a mercy petition followed this, but to no avail. After being sentenced to an indefinite jail term, he said that he "was tortured third degree for the first few months by the authorities" as they pressurized him to confess of being an Indian spy. Singh was lodged in seven different jails in Pakistan and was "kept in solitary confinement and remained chained for 17 long years." For the total period of three and a half decades in captivity, he did not see the sky or have a single visitor.