[Buddha-l] Looking for the source of a Padmasambhava's quote

[Benito Carral]

Dear Buddhalers,

   Yesterday, thanks to a Dharma fellow, I have found a
long cherished quote that I have preserved for years in
my  memory (although in a quite interesting paraphrased
way). Translated from Spanish, it says something like:

           Although  my  vision  is  wider than sky, my
        observation  of  the  cause  and  effect law is
        finer than sand.

                                          Padmasambhava

   Do you know where it comes from? Is there an English
translation? Could you provide me some context?

   Thank you very much and best wishes,

--
   Benito Carral
     Asturias, Sepharad (Spain)