im Theravada which is the closest to the buddha teaching. and what the monk did here, I do not think was good for him at all but I dont want to judge, but if he wasnt a arahant, then he has lost a precious life and I find it very weird. if Tibetan buddhist say that liberation only happens after death, this is in direct contradictory with the buddha teaching as a human life is precious especially when are in contact with the teaching of a buddha. form what Ive read about tibettan and zen buddhism, some of their notion would be completely dismmissed from the buddha and Id be very careful to trust any other sects then the one closest to the buddha teaching which is theravada.
its important to understand that meditation is only the mean to gains insight into your inner self and to find liberation. indeed, the buddha noticed to when he was in meditative absorption, he was totally happy and joyful and peaceful, but when he came out of the meditation, all the dukkha would come back. hence his search for the ending of all suffering not dependant on concentration as even meditation states are impermanent. but meditation is needed in order to reach the inner self and to remove the ego centricity in order to see what really there all along, within us. The insight you gain from the jhanas are invaluable. for example, after the third jhana, you clearly realize that there cannot be contentment in the mind if they are wishes in the mind. After the first jhana, you realize that the experience of the jhana and the joyful sensation that happen in the first jhana is much much more blissful and satisfactory then any pleasure you can obtain with the 5 senses and with the pleasure of sense contact. therefore you realize that you have within yourself something much more pleasurable that can be attain, at all time, with concentration. already, liberation begins as you dont seek all day long pleasure with the 5 senses and you dont lament over stuff you cant have in the world because you've experienced and understood that the pleasure of concentration is far greater and deeper then anything the world can brings and that it is within, available right here right now.
mental pain has no goal, it only brings more suffering and only a fool makes himself suffer. our mental suffering is automatic, our mind is out of control and buddhism is all about training the mind to take control of the mind. why out of control? because he thinks stuff we dont want to think, he hate stuff automatically. we must learn to see all his tendencies are try to replace by the opposite: the negativity with the positivity. eventually, mindfulness of thought becomes habitual and hatred will never enter his mind.
heres a buddha explanation on pain:
"When touched with a feeling of pain, the uninstructed run-of-the-mill person sorrows, grieves, & laments, beats his breast, becomes distraught. So he feels two pains, physical & mental. Just as if they were to shoot a man with an arrow and, right afterward, were to shoot him with another one, so that he would feel the pains of two arrows; in the same way, when touched with a feeling of pain, the uninstructed run-of-the-mill person sorrows, grieves, & laments, beats his breast, becomes distraught. So he feels two pains, physical & mental.
"As he is touched by that painful feeling, he is resistant. Any resistance-obsession with regard to that painful feeling obsesses him. Touched by that painful feeling, he delights in sensual pleasure. Why is that? Because the uninstructed run-of-the-mill person does not discern any escape from painful feeling aside from sensual pleasure. As he is delighting in sensual pleasure, any passion-obsession with regard to that feeling of pleasure obsesses him. He does not discern, as it actually is present, the origination, passing away, allure, drawback, or escape from that feeling. As he does not discern the origination, passing away, allure, drawback, or escape from that feeling, then any ignorance-obsession with regard to that feeling of neither-pleasure-nor-pain obsesses him.
"Sensing a feeling of pleasure, he senses it as though joined with it. Sensing a feeling of pain, he senses it as though joined with it. Sensing a feeling of neither-pleasure-nor-pain, he senses it as though joined with it. This is called an uninstructed run-of-the-mill person joined with birth, aging, & death; with sorrows, lamentations, pains, distresses, & despairs. He is joined, I tell you, with suffering & stress.
"Now, the well-instructed disciple of the noble ones, when touched with a feeling of pain, does not sorrow, grieve, or lament, does not beat his breast or become distraught. So he feels one pain: physical, but not mental. Just as if they were to shoot a man with an arrow and, right afterward, did not shoot him with another one, so that he would feel the pain of only one arrow. In the same way, when touched with a feeling of pain, the well-instructed disciple of the noble ones does not sorrow, grieve, or lament, does not beat his breast or become distraught. He feels one pain: physical, but not mental.
"As he is touched by that painful feeling, he is not resistant. No resistance-obsession with regard to that painful feeling obsesses him. Touched by that painful feeling, he does not delight in sensual pleasure. Why is that? Because the well-instructed disciple of the noble ones discerns an escape from painful feeling aside from sensual pleasure. As he is not delighting in sensual pleasure, no passion-obsession with regard to that feeling of pleasure obsesses him. He discerns, as it actually is present, the origination, passing away, allure, drawback, and escape from that feeling. As he discerns the origination, passing away, allure, drawback, and escape from that feeling, no ignorance-obsession with regard to that feeling of neither-pleasure-nor-pain obsesses him.
"Sensing a feeling of pleasure, he senses it disjoined from it. Sensing a feeling of pain, he senses it disjoined from it. Sensing a feeling of neither-pleasure-nor-pain, he senses it disjoined from it. This is called a well-instructed disciple of the noble ones disjoined from birth, aging, & death; from sorrows, lamentations, pains, distresses, & despairs. He is disjoined, I tell you, from suffering & stress.