Devotional service immunizes one from pollution in the age of pollution

We learn of the Brahma Muhurta hours being the best for spiritual
advancement and understanding. This is why early rising and mangala
arotrika are so strongly recommended for bhakti yogis.
The
Bhagavad-gita tells us: "What is night for all beings is the time of
awakening for the self-controlled; and the time of awakening for all
beings is night for the introspective sage."
Kali yuga may be
compared to the afternoon evening where atmosphere of passion and
ignorance tend to prevail. Diseases like cancer, insects like
mosquitoes and flies, and freakish weather, and a reduced human life
span indicate the inevitable pollution of the age. Despite this dismal
"nighttime" for 'all beings' devotees, living in 'the time of
awakening" are happy and satisfied serving the Lord and His devotees
and spreading the sacred teachings of Lord Krishna to 'all beings.'