assured and fear to have it taken from us: for it is evident, as fire
burns with greater fury when cold comes to mix with it, that our will is
more obstinate by being opposed:

"Si nunquam Danaen habuisset ahenea turris,
Non esses, Danae, de Jove facta parens;"

["If a brazen tower had not held Danae, you would not, Danae, have
been made a mother by Jove."--Ovid, Amoy., ii. 19, 27.]

and that there is nothing naturally so contrary to our taste as satiety
which proceeds from facility; nor anything that so much whets it as
rarity and difficulty:

"Omnium rerum voluptas ipso, quo debet fugare, periculo crescit."

["The pleasure of all things increases by the same danger that
should deter it."--Seneca, De Benef., vii. 9.]

"Galla, nega; satiatur amor, nisi gaudia torquent."

["Galla, refuse me; love is glutted with joys that are not attended
with trouble."--Martial, iv. 37.]

To keep love in breath, Lycurgus made a decree that the married people of
Lacedaemon should never enjoy one another but by stealth; and that it
should be as great a shame to take them in bed together as committing
with others. The difficulty of assignations, the danger of surprise, the
shame of the morning,