This is part of the Koan of Practice. There is no enlightenment beyond Shikantaza, which is itself perfect enlightenment. Nothing more to attain, no place more to get to. Zazen is Buddha all along. However, that attainment of radical non-attainment, to the marrow, will revolutionize one's living of this life-world-self!
Buddha will be realized in this life, and we will rise from the Zafu and seek to live a bit more like Buddha, in a bit more "enlightened way". Along the way, there are times and places where ALL TIME AND SPACE drop away, times when one feels like one is just wasting boring time ... yet ALL is sacred, all the arriving in every step, all just Buddha (boring moments are just 'Boring Buddha
'). What is more, after unceasing, diligent effort of a lifetime ... countless lifetimes ... we will all become Golden Buddhas. ALL TRUE. ... ... This is the Koan of Practice. Master all these Truths AT ONCE!