I can live with doubt and uncertainty and not knowing. I think it’s much more interesting to live not knowing than to have answers that might be wrong. […] I don’t feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose.
The Pleasure of Finding Things Out (1999)
Richard Feynman
(HT @mattischrome for the quote)
Digital, Data & Policy 
Well, it always give a good feel when after facing lots of tricks and failures finally you solved or discover a new idea.