For the cultivation of the spiritual ground, man needs no more than the two commandments of love; With these he works his spiritual field easily. If this is worked on, then everyone can sow so much in the same soil, as he only ever can and likes; or he can read as much of the good given, as he can procure of any one of them in fair amount - the whole sacred scripture and all explanations relating to the same, and he will take in nothing of all that which does not give him a rich harvest. – Explanation of Scriptures, Chapter 2, Paragraph 8