In the Srimad-Bhagwat when Karabhajan Muni was elucidating the different incarnations of Godhead in different Yugas, he said that "In the Kali-yuga the intelligent persons will worship the incarnation of Sree Krishna, by the transcendental Samkirtan method. This incarnation of Sree Krishna will be Non-Blackish in the color of His body but will constantly chant the Name of Krishna along with His many disciples who will act as the soldiers for the deliverance of the fallen souls of the Kali-yuga.
Sri Krishna Chaitanya preached as one of the Vaishnava Acharyas like Ramanujacharya and others and His mission was to establish the same theory of deliverance as was propounded by Sree Krishna Himself in the Bhagwat-Geeta. In the Bhagwat Geeta the Lord personally described as to the method of approaching Him, His real features, His different Potencies known as the Mohamaya and the yogamaya, His virat appearance His method of creation maintenance and destruction of the material world, information of the transcendental world which does not annihilate even after the annihilation of the material world. The living entities souls, the process of migration of the souls the description of the Mahatmas, their duties and lastly the duty of everybody after elaborate elucidation of the three modes of Nature, Satya Raja Tama and the different human races, work, knowledge, devotion, worship activities under the influence of such modes of Nature. In the Bhagavat Geeta a clear distinction has been made between the Ashura Prakrti and Daiva Prakrti and He has vehemently deprecated the demonic or Ashuric Prakriti and eulogised the Daiva Prakriti.
The Mohamaya Who is known as Durga, Kali, Chandi, Bhadrakali, Mohalaksmi, etc is the embodiment of His external Potency as described in the Chandi and it is the thankless task of the Mohamaya [to punish the asuras with Her all powerful weapons in the ten direction of the material world. She does not only create and maintain this material world but also she annihilates it according to the direction of the almighty God. In the Bhagavad-gita this Mahamaya has also been described as Daivi Maya and She is so powerful that the asuras cannot by-pass Her at any rate. The asura can get remission from the stroke of the trisula of Mohamaya when he the asura,] [text missing] surrenders himself to Sree Krishna the Personality of Godhead. As Superintendent of the material world the Mohamaya has been described Durga as the protectress of the great durga or fortress of the grand universes. She gives all the necessities for our existence but as soon as we become an Ashura like the Mohisha Suras, Ravanas, Hiranyakasipus, and in later ages like the Mussolinis and such others for the exploitation of the material energy, the Durga Devi at once appears Herself with Her dreadful trident and begins to devastate the whole existence by such tribulations as war, famine, pestilence, or sometimes annihilation of a total existence. The methods of annihilation as are invented by the human brain such as the atomic bombs etc are also Her creations but the deluded Ashuras, who are caused to act by the modes of Prakriti the material nature, do think themselves as the originator or inventor of such weapons. In that way a constant struggle is going on between the asuras and the prakrti and the asuras are thus being punished in different ways which the asuras cannot overcome by any method except by full surrender unto the Almighty God.
In the Bhagwat Geeta the last instruction is to surrender fully unto Him the author of the Bhagwat Geeta but unfortunate men of demonic mentality misunderstood the teachings of Bhagwat Geeta as a method of sophistry and therefore the same Personality of Godhead Sree Krishna in the garb of a transcendental devotee preach the same techniques of Bhagwat Geeta i.e. full surrender unto the Almighty God or His different potencies in a demonstrative way.