Srila Prabhupada says Krishna consciousness is not difficult. “You don’t have to do anything. Just man-mana bhava mad-bhakto, always think of Krishna.” But that requires love. The fervor you speak of is also love.
(_Begging for the Nectar of the Holy Name_)
Srila Prabhupada says
Krishna consciousness is easy to perform.
Just always think
of Krishna, become His
devotee and bow down
to Him. That
requires love. I’ve been writing
and “fervent” in
japa. That also requires love,
to serve Radha and Krishna by chanting
Their holy names.