Your pineal gland is your metamorphosed heart from your last incarnation, and is the seed of your next incarnation

the pearl of great price

"The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light."  —Matthew 6:22

They that sow in tears shall reap in joy. He that goeth forth and weepeth, bearing precious seed, shall doubtless come again with rejoicing, bringing his sheaves with him.  —Psalm 126:5-6

"ES IST ICH"

Source:  Rudolf Steiner, CW 201 [lecture 8, p. 109]