When I read HD's post, my thoughts echoed Helena's. I'd be really happy to read a post from any one who can give a clear answer to HD's questions
However, saying that by reciting purification mantras / prayers it can cause obstacles and even accidents to arise while we are traveling seems a little misleading, as it implies that reciting a Buddha's mantra can cause inconvenient harm.
If the samaya with your guru, yidam and protector is good, then surely just by reciting purification mantra your protectors not gonna go, "Okay, he asked for his karma to be purified by reciting this mantra, so this accident during his travel is justified".
I don't know, but it doesn't really make sense to me.
I don't think that you should brace yourself for an obstacle or an accident while you're traveling if you recite the purification mantra, because just by doing Dharma work or reciting your protector mantra (or when you're on an intensive retreat) purifies your karma. So what, brace for it on a daily basis?...While you're traveling from home to work, that's traveling. So should we never do purification mantras?
Accidents and obstacles are bound to happen/arise, if we're good with our dharmic practice, I think that we should just accept whatever that comes our way as clearing potentially bigger obstacles.
What do you guys think?