Contemplation: The Obvious Shadow

After reviewing the guidelines for practice, take this as your object of contemplation:

As birds glide high above the ground,
Even though their shadow is not seen for a while,
Since, unavoidably, a body cannot separate from its shadow,
Whenever circumstances ripen and the bird lands, its shadow becomes obviously apparent.

Rigdzin Jigme Lingpa, quoted in White Sail by Thinley Norbu, p. 100