When we see beautiful thing, what is it? It is just some light entering into our eyes and it is making us mad. Some frequency entering our ear & we get mad. Something scraping our tongue which is just a lump of flesh wiggling around. But when something touches its surface we go mad. This is material enjoyment & we take it seriously.
By rendering devotional service unto the Personality of Godhead, Sri Krishna, one immediately acquires causeless knowledge and detachment from the world. — Srimad Bhagavatam, 01.02.07.
To attain freedom from material life, one must take to Krishna consciousness.
Srimad Bhagavatam 6.5.16,
Srila Prabhupada
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.