Promise

Это ещё цвето́чки, а я́годки впереди́. [These are just flowers; berries will come soon.] {"Eto escho tsvetochki, a yagodki vperedi"} – Russian Proverb.

"The most radical revolutionary will become a conservative the day after the revolution." – Hannah Arendt, in 'The New Yorker' (12 September 1970)

"The sun comes up just about as often as it goes down, in the long run, but this doesn't make its motion random." – Donald Knuth, 'The Art of Computer Programming', Vol. II, 1969, section 3.3.2.