It is not the pursuit of greater and greater states of happiness and bliss that leads to enlightenment, but the yearning for Reality and the rabid dissatisfaction with living anything less than a fully authentic life.
Eating meat is a leftover of the greatest brutality [killing]; the transition to vegetarianism is the first and most natural consequence of enlightenment.
According to accounts of the Buddha's life, it would seem that he had a very deep relationship with nature. He was not born in the royal palace but in a park, under a sala tree. He attained complete enlightenment under the bodhi tree and left this earth to enter Parinirvana, again, between three sala trees. It would seem that the Buddha was very fond of trees.
Instead of striving towards some distant goal that you will never reach, I invite you to stop and ask: How am I avoiding the enlightenment that is already present in each moment? How am I seeing separation where it doesn't exist?
In dealing with the arrogant asserter of doubt, it is not the right method to tell him to stop doubting. It is rather the right method to tell him to go on doubting, to doubt a little more, to doubt every day newer and wilder things in the universe, until at last, by some strange enlightenment, he may begin to doubt himself.