If you can turn a murderer into a mere thief, you are making progress.
Man (and woman) has an infinite capacity for self-development. Equally, he has an infinite capacity for self-destruction. A human being may be clinically alive and yet, despite all appearances, spiritually dead.
When tomorrow comes, think tomorrow's thoughts.
You must empty out the dirty water before you fill the pitcher with clean.
No practice exists in isolation.
You have not forgotten to remember; You have remembered to forget. But people can forget to forget. That is just as important as remembering to remember - and generally more practical.