卽心卽佛, 卽心是佛 (or 卽心成佛)
Dictionary Definition :
Definition[1]
:
The identity of mind and Buddha, mind is Buddha, the highest doctrine of Mahāyāna; the negative form is 非心非佛 no mind no Buddha, or apart from mind there is no Buddha; and all the living are of the one mind.
Source
:
A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous