None else can harm our soul as much as sensual pleasures and passions.
As much as violence, lies, theft and bad dispositions harm our soul, much more harm is done by accumulation alone. As much as the soul is bound by karmas due to sensual pleasures, so much bondage is done by unrestrained mind. Greed is many times more deadly than anger, pride and delusion. All the living beings of the world together cannot do as much harm even in a kalpkaal, as much as passions can harm you in an antarmuhurta (less than 48 minutes). All the living beings of the world cannot be so beneficial, as much as your own soul by manifesting right perception, right knowledge, right conduct & right renunciation. So save your soul from the path of harm and lead it on the path of welfare otherwise you will keep on diving in the ocean of the world till eternity and not reach the shore.