One should avoid hearing from a person not situated in Vaisnava behaviour. A Vaisnava is nivrtta-trsna. That is, he has no material purpose, for his only purpose is to preach Krishna consciousness. So-called scholars, philosophers and politicians exploit the importance of Bhagavad Gita by distorting its meaning for their own purposes.
Eagerness to hear is an essential quality for spritiual progress.
Just like we need food for the body, we need food for the soul and what is that food? Hearing and chanting God’s names in the association of saintly people. Otherwise, we will give in to temptations at the smallest instance. We will be weaklings, spiritually.
Darshan should be taken not with the eyes but with the help of ears as "Darshan through Hearing" makes one fearless.
As long as we chant and hear Krishna katha, we are not affected by the Kaal (Time). Hearing is not the end, it is just the beginning.