Thrift is care and scruple in the spending of one's means. It is not a virtue and it requires neither skill nor talent.
Immanuel KantAct in such a way that you treat humanity, whether in your own person or in the person of any other, never merely as a means to an end, but always at the same time as an end.
Immanuel KantHuman reason has the peculiar fate in one species of its cognitions that it is burdened with questions which it cannot dismiss, since they are given to it as problems by the nature of reason itself, but which it also cannot answer, since they transcend every capacity of human reason.
Immanuel Kant