I ventured a question, reading from the Gita I always carried with me.
"Srila Prabhupada, what does this verse mean: '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.' "
I wasn't sure he'd heard me.
"Four o'clock," he said. "Our devotees wake up at four o'clock."
Aravinda interjected that I was asking about a verse from the Bhagavad-gita. I read the verse again in a louder voice.
Srila Prabhupada began to laugh.
"Yes," he said. "This verse means that when the karmis [materialists] see us they are laughing. And when we see them we are laughing. But we know we are right. Therefore, our laugh is best. The materialists think we are wasting our time in spiritual life. We know they are wasting their time in material life. Therefore, our laugh is best."

Hari Vilasa Dasa
From a 1991 BTG