There's a bit of a conflict going on with what I am learning in Buddhism and popular psychology where one is encouraged to think that all emotions are okay. In Buddhism we are taught in right effort that unwholesome emotions are not okay and should be prevented or abandoned. Then one should work at bringing into being wholesome emotions and sustaining those.
In one sutta the Buddha talks about how before he was enlightened he spent some time dividing up his thoughts into either wholesome or unwholesome. He watched his thoughts carefully and reflected on them and saw that those which where to do with sense-desire, ill-will or harmfulness led to harm for himself and others, they obstructed wisdom and did not lead to nibbana, so he placed them in the unwholesome pile and expelled them from his mind bringing them to an end.
And when he observed thoughts of letting go (renunciation), goodwill, and harmlessness, he saw they were beneficial, and where conducive to gaining wisdom, and attaining nibbana. So he nurtured those thoughts, strengthened them and brought them to completion. And at the end of this experiment he said it worked!
How long he spent doing that I don't know, he spent much time prepping his mind before he sat under the Bodhi tree to get enlightened it seems. So one should not get too disheartened at not being able to change one's head straight away lol.
I read something Ajahn Brahm wrote in his book 'mindfulness, bliss and beyond, a meditator's handbook' about how he loathed the all night sits he had to do in Thailand as a monk. He would feel ill-will towards the sits feeling they were stupid and unnecessary. He was also suffering from malnutrition and sleep deprivation at the time. He wrote it took him a couple of years to realise it was his aversion that was the problem, and when saw that he stopped fighting it and then found peace. Reflecting on that I realise I have the same problem sometimes.
Anyway he's a great monk now, and I find it reassuring when monks and Buddhist teachers talk about how they also struggled on the path in the past and how they overcame it. As it gives me hope that I can do this, and helps me cut myself some slack for not getting it right away, it can take years of training. I guess we have all had years of training the mind in the wrong way and become masters at unwholesome states of mind. One isn't going to change that course in a single night (-:
Patience seems to be my teaching this year. I am having to learn a great deal about being patient. As the mind is a lot like a garden, that grows, flowers and fruits in its own time. Impatience will not make anything grow faster.