Through its own efforts, the mind assumes the shape of any object, it concentrates itself upon. If it thinks of a woman, it assumes the shape of a woman, Rajas (passion) will be infused into the mind; If it thinks of GOD or Brahman or Infinity, Sattva (purity) will be infused. It is one of the underlying concept behind Idol worship where the devotee thinks of a GOD with great virtues and unknowingly developing those great virtues inside him. This concept can be applied in many places. A simple example, “Work is worship” – here the worker fully concentrates on his job, it becomes GOD to him.