He is always with His associates and paraphernalia. For instance, if someone says, "Give something to eat to the man with the weapons," the eating process is done by the man and not by the weapons. Similarly, in Kṛṣṇa consciousness, a devotee may be interested in the paraphernalia and locations—such as the Battlefield of Kurukṣetra—which are associated with Kṛṣṇa, but he is not concerned with simply any battlefield. He is concerned with Kṛṣṇa—His speech, His instructions, etc. It is because Kṛṣṇa is there that the battlefield is so important.
This is the summary understanding of what Kṛṣṇa consciousness is. Without this understanding one is sure to misunderstand why the devotees are interested in the Battlefield of Kurukṣetra. One who is interested in Kṛṣṇa becomes interested in His different pastimes and activities.
The definition of a pure devotee, as given by Rūpa Gosvāmī in Bhakti-rasāmṛta-sindhu, can be summarized thus: his service is favorable and is always in relation to Kṛṣṇa. In order to keep the purity of such Kṛṣṇa conscious activities, one must be freed from all material desires and philosophical speculation. Any desire except for the service of the Lord is called material desire. And "philosophical speculation" refers to the sort of speculation which ultimately arrives at a conclusion of voidism or impersonalism. This conclusion is useless for a Kṛṣṇa conscious person. Only rarely by philosophical speculation can one reach the conclusion of worshiping Vāsudeva, Kṛṣṇa.