Canto 10 Chapter 13 Text 45

tamyāṁ tamovan naihāraṁ

khadyotārcir ivāhani

mahatītara-māyaiśyaṁ

nihanty ātmani yuñjataḥ

As the darkness of snow on a dark night and the light of a glowworm in the light of day have no value, the mystic power of an inferior person who tries to use it against a person of great power is unable to accomplish anything; instead, the power of that inferior person is diminished.