Bhagavad Gita 6.19 · BG 6.19
Chapter 6Verse 19
Dhyana Yoga
यथा दीपो निवातस्थो नेङ्गते सोपमा स्मृता। योगिनो यतचित्तस्य युञ्जतो योगमात्मनः॥
yathā dīpo nivāta-stho neṅgate sopamā smṛtā, yogino yata-cittasya yuñjato yogam ātmanaḥ
Translation
As a lamp sheltered from wind does not flicker, so is the disciplined mind of one steady in practice.
A steady mind is a lamp that doesn't flicker, even in the wind.
What does this mean?
A well-known image for a trained mind. Not motionless because nothing happens around it, but steady because it's learned not to flicker at every draft.
In simple words
Krishna compares a disciplined mind to a lamp flame in a place with no wind. It doesn't flicker. Not because nothing is happening around it, but because it's sheltered enough, and steady enough, that the drafts don't reach it.
The deeper idea
The image is precise. A flame flickers when air moves across it. A trained mind is likened to a flame that's been placed out of the wind, so it burns straight and still. The stillness isn't the absence of a world full of disturbances. It's the result of practice that keeps those disturbances from reaching the flame. The verse is describing an achievable inner condition, not a magical one, and the word for it is steadiness under conditions that would normally cause wavering.
How it applies to life
Two people get the same piece of bad news. One is visibly rattled for the rest of the day, snapping at people, unable to focus. The other registers it, feels it, and stays largely level. The difference usually isn't that the second person cares less. It's that they've built some shelter around the flame through practice, so the gust moves the air without putting the light out.