Is Nibbana or Nirvana attainable in this lifetime?
Certainly, there are many passages in the Tripitaka, the Buddhist Scripture, some of which mentioning Nibbana in this lifetime that Dhamma which can be seen in this life is timeless, inviting one to come and see, appropriate to be brought into practice and realisable for themselves by the wise. Anyone who can free oneself from clinging to egotism is sure to attain Nibbana or Nirvana here and now.