BG 6.19
यथा दीपो निवातस्थो नेङ्गते सोपमा स्मृता ।
योगिनो यतचित्तस्य युञ्जतो योगमात्मनः ॥
योगिनो यतचित्तस्य युञ्जतो योगमात्मनः ॥
yathā dīpo nivāta-stho neṅgate sopamā smṛtā
yogino yata-cittasya yuñjato yogam ātmanaḥ
yogino yata-cittasya yuñjato yogam ātmanaḥ
Word-for-word meanings
yathā — just as; dīpaḥ — an oil lamp; nivāta-sthaḥ — situated in a windless place; na iṅgate — does not flicker; sā — such; upamā — [is] the analogy; smṛtā — cited; yoginaḥ — in regard to the yogī; yata-cittasya — whose mind is controlled; yuñjataḥ — [and] who is unwaveringly engaged; yogam — in meditation; ātmanaḥ — related to the self.
Translation
Just as an oil lamp situated in a windless place does not flicker, so too the yogī whose mind is controlled remains unwaveringly engaged in meditation on the self. Such is the analogy cited in this regard.