1 WORD THAT SEPARATES A PROFESSIONAL GAMBLER FROM A NORMAL GAMBLER PLEASE AND WHY?

[mrbecky1]

If you only had 1 word that a professional gambler needed to do what he/she did, compared to what a normal gambler has not got what would it be and why? Funny comments are more than welcome! I believe there can be many things that can separate a professional gambler from a normal gambler, but there is only one ability that a continually losing punter does not have? I know what it is, but I would love to hear others' opinions and experiences?

[The Saint]

Discipline - because without it, you can be the best tipster in the world and still lose.