Srila Bhaktisiddanta Sarasvati Goswami Maharaja in setting up the Gaudia Math , which ISKCON is based upon , except for ISKCON has a unique position to teach Vedic culture to a western audience,  Srila Bhaktisiddanta brought together the teachings of all the sampradayas , those of Bramha ,Siva , laxmi and the Kumaras , each with their trancendental established ” professor ” acaryas,  who are Madhva ,Ramanuja Vishnu Swami and Nimbarka acarya.

They taught , respectively ,  purified monism ,specific monism , pure monism, and ,  one and difference . Later, Mahaprabhu taught uniquely inconceivable and simultaneously one and difference

Each of these four taught the different aspects for looking at the position of the soul,  in relationships with Divinity . These particular acaryas start their trancendental expositions,  leaving aside the teaching of Sankacarya  , namely the impersonal philosophy of the Vedas ,  the Brahman , the spiritual effulgence of Divinity.

We can see just how broad Gaudia Vaisnavism is , bringing everyone in  appropriate stages from worship of God alone , then God with his associates who are in awe of Him , then to worship of God with  His close family members , then to worship of God with his most intimate devotees , then to worship of God by those who are one with The Supreme Goddess of fortune Radharani, this worship is termed ,pranaya ,tad bhavika   oneness .It’s  like the flowers of a vine that wraps itself on a tree , the Vine is Radharani, the tree is Krishna, the flowers, are the Manjari Servants of Radharani.

More  and much more detail on the broadness of Srila Bhaktivinod Thakur,  Srila Bhaktisiddanta Sarasvati Goswami , and how ISKCON is progress in its presentations of the Gaudia mission.