The natural state (rigpa), need not be complicated, it requires no methods nor practices and is spontaeneously complete without effort of any kind... 'this' is it. when aware aware, when unaware unaware, just in your natural state... making an effort, not making an effort, how could you not be in your natural state, you were born in it, you will die in it. naturally so.
why worry about annihilation of self and annihilation of buddha nature (the great icchantika), it would be perfectly natural to ask the Truth, for a new self, a new nature. once one has come near to the end, one finds oneself back at the begging, but one has changed.
theres nothing at all to worry about, this normal mind is the way, ones everyday thought is the way, ones everyday life is perfectly enlightened. why worry about passions and defilements... you are already perfect... how could you not remain in a natural state? impossible.
you have already arrived, you always were perfect. naturally so. this is the teaching of Dzogpa Chenpo, where even defilements are tools for growth.
best wishes, Tom.