A certain hardness of character in some students is not altogether a defect as there is no particular virtue in being soft. The world being what it is today a little toughness acts as a protective shield. The defect lies only in pushing this to extremes and in not balancing it appropriately with its opposite. For such persons, there is the need of evolving a gentler side of the character and the result will eventually be all to the good in a finer, better balanced personality.
-- Notebooks Category 2: Overview of Practicies Involved > Chapter 5: Balance the Psyche > # 189