Those who do not remember the past are condemned to repeat it. George Santayana
Every advantage in the past is judged in the light of the final issue. Demosthenes
The past is the future of the present. Japanese Proverb
A book is a good friend when it lays bare the errors of the past. Hindi Proverb
The thousand brilliant accomplishments of the past cannot serve today's purpose. Tibetan Proverb