The precepts are not formulated as imperatives, but as training rules that laypeople undertake voluntarily to facilitate practice. In Buddhist thought, the cultivation of dana and ethical conduct themselves refine consciousness to such a level that rebirth in one of the lower heavens is likely, even if there is no further Buddhist practice. There is nothing improper or un-Buddhist about limiting one's aims to this level of attainment.
The cultivation of dana and what kind of conduct refine consciousness?
ethical