First Mistake needs to be last one?

It’s obvious that mistakes can be very hard to handle because we not only lose money, but also get dent in confidence, so do you think the first mistake should be last? We should be that eager and determined because only then we will perform well and achieve good results. I am working under OctaFX and with them, I can do it all nicely having small spreads at 0.1 pips while there are also massive cash back scheme which further boost me with working.