i know that the wanting for nibbana is a good thing, and not a mere thana for the texts.
the buddha said that is possible to reach it in 7 years but also in 7 days.
the logic and rationality of the meditation, bhavana, cultivating and training of the mind is also science based, with changing of the brain and mind structure.
It's a bit egotistical, but i started to believe that this goal is the most important thing to do in this life. I don't know if I reached some levels of insight, but i started to se see more the dukkha in the things, and knowing that there is a path to end dukkha this elicitate my thana.