Guru Arjan dev ji continued preaching the mission of Guru Nanak inspite of Prithia’s Intrigues. He toured extensively the territory between ravi and beas. He founded the town of Taran Taaran and Built a shrine and excavated a tank there. He also laid the foundation of the town of Kartarpur, near jullundhur(Punjab).
The Great task accomplished by Guru Arjan dev ji was the completion of the tank (Sarovar) at the amritsar. A Hari Mandir was built in the midst of the Sarovar. At the Invitation of the Guru, Sant Mian Mir, a Muslim Divine, laid the foundation of Hari Mandir, the temple of God.
The Shrine was purposely built on a level lower than the surrounding land, so that the devotees had to step down to enter it. Besides, Unlike most temples it was open on all sides. These special features thus symbolized the new faith which required even the lowest to go still lower and its doors were open to one and all and at the all times.
Guru Arjan Dev ji Required money for the construction of the temple. All devotees were asked to contribute one tenth of their income in the name of the Guru. Hundreds of sikhs helped with the digging and construction work, which the called ,”Kar Seva” or labour of love.
When the temple was completed, the guru thanked God almighty without whose grace to the work could not have been accomplished. and in joy and Gratitude , he said:
God himself came, and stood up to do the work of saints,
Into the beautiful land and beautiful work
He poured nectareous water, completed the work”
And all our desired are fulfilled.
However, the greatest work done by Guru Arjan dev ji was the compilation of the Adi Granth. He collected the Hymns of the First four gurus and Added his own along with the hymns of Farid ji, Kabir ji , Ravidas ji, Jaidev ji, and Bhikham ji. The moment it was completed it began to be respected by a large number of sikhs as their holy book. Guru Arjan Dev ji encouraged trade and Industry among the sikhs. Guru Arjan dev ji also favoured widow remarriage and condemned the use of intoxicants, and opened a leprosy centre at Taran Taran.