Dogen's Genjo Koan: Section Ten

Accordingly, in the practice-enlightenment of the buddha way, to attain one thing is to penetrate one thing; to meet one practice is to sustain one practice.
Here is the place; here the way unfolds. The boundary of realization is not distinct, for the realization comes forth simultaneously with the mastery of buddha-dharma. Do not suppose that what you realize becomes your knowledge and is grasped by your intellect. Although actualized immediately, the inconceivable may not be apparent. Its appearance is beyond your knowledge.

Accordingly, in the practice-enlightenment of the buddha way, to attain one thing is to penetrate one thing; to meet one practice is to sustain one practice.
In our practice, we don't seek enlightenment externally to this moment. We don't make divide this experienced life into 'appearance' and 'reality'. We don't imagine an objective reality behind appearance. Both the surface appearance and the deeper revelation are 'it'. Practice and enlightenment are not separate. We don't seek for special states of mind. Samsara and nirvana are not separate.

Here is the place; here the way unfolds. The boundary of realization is not distinct, for the realization comes forth simultaneously with the mastery of buddha-dharma.
Enlightenment can only be found here and now in this moment. It is not the case that there is an inherent Buddha Nature in all beings - it does not appear until the moment of awakening.

Do not suppose that what you realize becomes your knowledge and is grasped by your intellect. Although actualized immediately, the inconceivable may not be apparent. Its appearance is beyond your knowledge.
Realisation is not intellectual understanding and it cannot be grasped intellectually. This is true in realisation as well as in non-realisation. A Buddha cannot grasp his or her realsation intellectually. Hence, it is possible to be realised without being self-conscious of realisation. And even though this realisation can be manifested in thoughts and words, those thoughts and words do not contain realisation.