For more about the tenth century Eastern Orthodox mystic and priest Symeon the New Theologian, see this earlier post.

The fire rises in me,
     and lights up my heart.
Like the sun!
Like the golden disk!
Opening, expanding, radiant —
     Yes!
     — a flame!

I say again:
     I don’t know
     what to say!

I’d fall silent
— If only I could —
but this marvel
     makes my heart leap,
it leaves me open mouthed
     like a fool,

urging me
     to summon words
     from my silence.

Translation Ivan M. Granger