Truths face is covered with a golden lid; remove that, O Pūṣan, that I, Truth’s devotee, may see It.
The seeker has understood the limitations of his ego-bound identity – limited awareness. He is praying to SELF to reveal Itself.
Pusan is nourisher – the name of the sun. Sunlights up the world. The world is nothing but mithya names and forms. Seeker is using a beautiful analogy of a golden disk of sunlight shining on the earth covering the SELF. Brahman is covered by names and forms in the form of five elements – Space, wind, fire, water, and earth. The individual self is covered by mithya body-mind-intellect. Through this prayer, he is seeking removal of the veil of Maya covering SELF.
hiraṇmayena pātreṇa satyasyāpihitaṃ mukham |
tat tvaṃ pūṣann apāvṛṇu satyadharmāya dṛṣṭaye || 15 ||