Neither a person nor a nation can exist without some higher idea. And there is only one higher idea on earth, and it is the idea of the immortality of the human soul, for all other "higher" ideas of life by which humans might live derive from that idea alone.
One should stick by one's soul, and by nothing else. In one's soul, one knows the truth from the untruth, and life from death. And if one betrays one's own soul-knowledge one is the worst of traitors.
If bodies please thee, praise God on occasion of them, and turn back thy love upon their Maker; lest in these things which please thee, thou displease. If souls please thee, be they loved in God: for they too are mutable, but in Him they are firmly established.