Mawlana Jalaluddin Rumi says in his Mathnawi:
There is many a one whose eye is awake
but whose heart is asleep.
What, in truth, should be seen
by the eyes of creatures of water and clay?
The one who keeps her heart awake,
though the eye of her head may sleep,
her heart will open a hundred eyes.
O son, keep your heart awake, and say this du'a taught by Ibn Atha'illah as-Sakandari in his al-Hikam.
Ilahi 'al lim ni
min 'ilmikal makzun
wa bi sirris
mikal ma sun
Lord, teach me
from Your knowledge that is hidden in Your treasure trove
and protect me with the secret
of Your well guarded Name.