Beauty of The Lord
The Lord’s beauty is compared to rainfall because when the rain falls in the rainy season, it becomes more and more pleasing to the people.
Ungrateful persons are those who do not understand how much benefit they are deriving by the arrangement of the Lord.
Hearing about and glorifying the Lord are identical with the transcendental nature of the Lord and by so doing one will be always in the association of the Lord. This brings freedom from all sorts of fear.
Materialistic way of life is always fearful because at every step there is danger. Materialistic Life is full of anxieties and fear.
Srimad Bhagavatam 7.6.5,
Srila Prabhupada