That physical life is a blessed school, is unmistakable. But, if you do not take advantage so as to sufficiently learn the lessons intended for your spiritual growth, then your entrance in the human apprenticeship will be worth nothing.
That the path of good is laborious and difficult is undeniable. However, if you are not disposed to follow it, then no one will free you from the dangerous influence of evil.
That eternal happiness is a supreme achievement, way beyond the transient state in the flesh is indisputable. Nevertheless, if you desire to continue in the field of easy and inferior pleasures of the lowest levels, then you will wander in them indefinitely.
That God is with us in all circumstances is an unquestionable truth. Still, if you are not with God, no one can foresee to what depths your Spirit will descend in the domains of intranquillity and darkness.
XAVIER, Francisco Cândido. Christian Agenda. By the Spirit André Luiz. Great Britain: Allan Kardec Publishing Ltd, 1998. Chapter 50.