The more worldly prosperity you enjoy, the more destitute you are likely to be of spiritual riches, for an abundance of this world's goods leads you to trust in them rather than in God. Oh! That you knew the misery which such prosperity prepares for you! The desire of more which springs from the love of riches is a torment which far exceeds the pleasure we derive from their possession. It will entangle you in a thousand temptations, fill you with cares, and under the delusive image of pleasure plunge you into renewed sin and prove an inexhaustible source of trouble and disquiet. Again, riches are acquired only at the expense of pain and labor; they are preserved only by care and anxiety; and they are never lost without bitter vexation and grief. But, worse than all this, they are rarely accumulated without offense against God; for, as the proverb says, "A rich man is either a wicked man or a wicked man's heir."
--Louis de Granada, The Sinner's Guide