Life without zazen is like winding your clock without setting it. It runs perfectly well, but it dosen't tell time.
Zazen is the ultimate practice. This is indeed the True Self. The Buddhadharma is not to be sought outside of this.
In zazen, one is one's present self, what one was, and what one will be, all at once.
Zazen is an activity that is an extension of the universe. Zazen is not the life of an individual, it's the universe that's breathing.
The emphasis is on meditation in Tantric Zen. The experience of meditation in formal practice, zazen, where you're sitting down and meditating and concentrating.
The more you practice zazen, the more you will be able to accept something as your own, whatever it is.
By perfecting the practices of zazen and mindfulness, by learning patience and love and by realizing the essential emptiness of all phenomena, you will discover nirvana.
So it is not a matter of whether it is possible to attain Buddhahood, or if it is possible to make a tile a jewel. But just to work, just to live in this world with this understanding is the most important point, and that is our practice. That is true zazen.
Zazen is better than a home. Zazen is a home that you can't ever lose.