Anima Astrologiae or A Guide for Astrologers by William Lilly 1676

The 13th Consideration, is to regard the Sun and his Significators, for he is also called a fortune, and so, whatever aspect he shall be beheld by, unless it be Opposition; but by Conjunction he becomes an Infortune, because he then renders every star that is so in Conjunction with him, combust and unfortunate; unless the same shall be in the heart of the Sun, and there every star is fortified.

14.What Mercury and the Moon signifies