Our worldly successes cannot be guaranteed but our ability to achieve spiritual success is entirely up to us thanks to the grace of God. The best advice I know is to give is to give those worldly things your best but never your all - reserve the ultimate hope for the only one who can grant it.
And yet in a culture like ours which is given to material comforts and addicted to forms of entertainment that offer immediate gratification it is surprising that so much poetry is written.