Bhagavad Gita, Chapter 6, Verse 19

यथा दीपो निवातस्थो नेङ्गते सोपमा स्मृता । योगिनो यतचित्तस्य युञ्जतो योगमात्मनः

yathā dīpo nivātastho neṅgate sopamā smṛtā | yogino yatacittasya yuñjato yogamātmanaḥ

Translation

'As a lamp in a sheltered spot does not flicker' — this has been thought as the simile of a Yogin of subdued thought, practising Yoga in the Self.

— Alladi Mahadeva Sastri

Word meanings

yathā
as
dīpaḥ
a lamp
nivātasthaḥ
in (a) windless (place)-standing
na
not
iṅgate
flickers
that
upamā
simile
smṛtā
is remembered
yoginaḥ
of the Yogi
yatacittasya
controlled, mind, whose, of him
yuñjataḥ
(of the) practising
yogam
the yoga
ātmanaḥ
of the self

Śaṅkarācārya's commentary

This simile has been thought out by those versed in Yoga, by those who know the ways of the thinking principle.