Dalai Lama: Fate of the 12th

...the Twelfth Dalai Lama had once experienced a vision of Padmasambhava, in which the great guru spoke the following words of prophecy:

O Trinley Gyatso, supreme lord of truth,
You who are my own mind emanation,
If you accept the practice of secret mantra by
Relying upon a Knowledge Lady [jnanamudra],
Tibetan Buddhism will thrive
And the Dharma Protectors will act.
But if you do not rely upon
The siddhi of karmamudra [sexual yoga],
You will soon die.

The Twelfth Dalai Lama died by the age of twenty.