A.C. Bhaktivedanta Swami Prabhupada, Picture Quotes

The sankirtana devotees are very very dear to Krishna. Because you are doing the field work of book distribution, Krishna has immediately recognised them as true servants. Just like during war time, a farm boy or ordinary clerk who goes to fight for this country on the front immediately becomes a national hero for his sincere effort. So Krishna immediately recognises a preacher of Krishna consciousness who takes all risks t deliver his message.
Picture Quotes, Srimad Bhagavatam

The manifestation of unadulterated devotional service is exhibited when one’s mind is at once attracted to hearing the transcendental name and qualities of the Supreme Personality of Godhead, who is residing in everyone’s heart.
Srimad Bhagavatam 3.29.11-12,
Srila Prabhupada
A.C. Bhaktivedanta Swami Prabhupada, Picture Quotes

One should not be idle but should be very enthusiastic about executing the regulative principles. Neglect of the regulative principles will destroy devotional service. In this Krishna consciousness movement there are four basic regulative principles, forbidding illicit sex, meat-eating, gambling and intoxication. A devotee must be very enthusiastic about following these principles. If he becomes slack in following any of them, his progress will certainly be checked. — The Nectar of instruction, Text 03.
A.C. Bhaktivedanta Swami Prabhupada, Picture Quotes

Scientist display their intellectual energy & deny the existence of Supreme Energy…. but devotees worship Krishna as the greatest Scientist.
Bhakti Charu Swami, Picture Quotes

As a leader my duty is to make Krishna Consciousness so exciting for you that you even stopeating and sleeping! It automatically happens when you are excited. Krishna Consciousness must be like that.