Here is a poem by Rudolf Steiner — focused on the heart — from his book, 'Love and its Meaning in the World'.

In the heart–
a human organ
of all organs
containing matter
more spiritual
than any other.
In the heart–
matter revealing
spirit more
than any other.
In the heart —
the Sun
in the human universe.
In the heart–
we are
closest
to the deepest
source of our being.