Hinduism~ What hidden lesson lies behind Shri Krishna's vow....?

lord krishna knew if he fought for pandavas they will definitely win d battle but they wont be remembered or given credit for it , also they would'nt have had put all d efforts they initially put ...... he wanted them to fight d battle on their own to understand their weaknesses , strong points , sufferings n pains n joy n happiness .....d same is with us god want us to fight our own battle to feel everything , he wants us to put our full efforts like d pandavas rest is upto god, if we r correct n given r 100% than victory will be ours n he will be there for our help......................... GOD HELP THOSE WHO HELPED THEMSELVES