This opportune physical form
Is worth more than a wish-granting gem.
You only gain its like the once.
So hard to get, so easily destroyed,
It's like a lightning bolt in the sky.
Contemplate this, and you will realize
All worldly actions are but winnowed chaff,
And night and day you must
Extract some essence from your life.
I, the yogi, practiced this way;
You, wanting liberation, do the same!
- Lord Tsongkhapa, King of the Dharma