to do; to engage in / to write; to compose / to pretend; to feign / to regard as; to consider to be / to be; to act the part of / to feel (itchy, nauseous etc) / writings; works
息
=
心
+
自
:
Marie Curie practices breathing fire in front of the space station while watching herself in a hand mirror. Because she is so exited her heart is pounding very hard.