"Never make a Friend on a sudden, for though the first Affection makes the deepest Impression, yet that Love is held most permanent which dives into the Soul by soft Degrees of mutual Society, and comes to be matured by Time."
An Index to Mankind: or Maxims Selected from the Wits of all Nations 
An Index to Mankind: or Maxims Selected from the Wits of all Nations (Dublin: James Hoey, 1765). &lt;<a href="http://books.google.com/books?id=5JUDAAAAQAAJ">Link to Google Books</a>&gt;