It is obedience to the truth that purifies the soul and it is coexistence with falsehood that pollutes it. Obedience to the truth begins with the small truths of daily life that can often be demanding and painful. This obedience then extends to obedience without reservations before the Truth itself that is Christ. This obedience not only purifies us but above all also frees us for service to Christ and thus for the salvation of the world, which nevertheless always begins with the obedient purification of one's own soul through the truth. We may point out the way towards the truth only if by obedience and patience we let ourselves be purified by the truth.
To the extent we as individuals are not ourselves purified by obedience to the truth -- starting with "the small truths of daily life" -- we cannot point others towards the truth. That's a challenge to those who might think looking at the stars excuses being in the gutter.