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Immortality is to live your life doing good things, and leaving your mark behind.

The first requisite for immortality is death.

Immortality is not a gift, Immortality is an achievement; And only those who strive mightily Shall possess it.

The only thing wrong with immortality is that it tends to go on forever.

Each life makes its own immitation of immortality.

If your contribution has been vital there will always be somebody to pick up where you left off, and that will be your claim to immortality.

Perhaps nature is our best assurance of immortality.

I don't want to achieve immortality through my work. I want to achieve it through not dying.

Immortality is a long shot, I admit. But somebody has to be first.

If something comes to life in others because of you, then you have made an approach to immortality.