double deep

From a thief one should learn:

1) To work at night
2) If one cannot gain what one wants in one night to try again the next night
3) To love one's co-workers just as thieves love each other
4) To be willing to risk one's life even for a little thing
5) Not to attach too much value to things, even though one has risked one's life for them, just as
a thief will resell a stolen article at a fraction of it's real value
6) To withstand all kinds of beatings and tortures but to remain what you are
7) To believe that your work is worthwhile and not be willing to change it

- Rabbi Dov Baer