Many of us do not care what legacy we leave to posterity when our candle burns out.
If you want to leave a legacy for posterity, if you have not started working on that, you better do.
Those who leave big legacies behind and are remembered long after they are gone from this world like Martin Luther King, Jr., Nelson Mandela, Abraham Lincoln, Blessed Mother Teresa of Calcutta and Saint Pope John Paul II are those who live for dreams bigger than them. They live not for themselves but for others. They serve not themselves but their fellow humans. Their focus is not earthly gain but service to humanity.
You can do this,can’t you?
Those who depart and are forgotten shortly afterwards are those who live for themselves, who spend their time running after earthly gain and power. If they are remembered at all, it is in negative terms.
It is left to you to choose whether to leave a name behind or not; whether to leave a legacy behind or not; whether to be remembered positively or negatively when you leave this world.