Dear Raj354u , when big guys like warren buffet say's , "Rule No. 1: Never lose money. Rule No. 2: Never forget rule No. 1." they are saying it for investing. Don't take their advice for trading. Not accepting small loses is like wiping out account at once. Honestly their is no business in the world where you can not or never lose any money so why it should be different in trading business.
Trader only earn when other trader lose. Thats obvious man... nobody print their own money for themselves. Money goes from one person to another person no matter which business it is.
Market is not zero sum game...its negative sum game..thats true. But that has nothing to do with you as a trader. Market never asked you to buy or sell at any time or at particular price. Its you who made all the decisions. So there is no need to blame on market.
As you said, you can make profit sometimes and then you lose sometimes and again profit...and this cycle continues.......dear raj thats why risk reward and money management is extremely important in order to keep the loses small and profit bigger and make profit over the period of time.
I hope you take it in a positive way.