The basic principle of every original religion in this world is discipline.
Srimad Bhagavatam it is repeatedly and clearly said that the essence of religion in the Age of Kali is the chanting of the holy name of Krishna.
Caitanya Caritamrta Adi lila 3.50
In this age of Kali there is no other religion but the glorification of the Lord by utterance of His holy name, and that is the injunction of all the revealed scriptures.
Religion doesn't cause war but misunderstanding of religion does.
Lecture on “Overcoming the IIT disadvantage” delivered at IIT Chennai on 19th Nov 2006
The essence of each religion is to transform our consciousness to reestablish our relationship with Lord.
When religion is studied scientifically, it will transcend all sectarian boundaries.