Peb yog cov chaw tsim khoom ntawmxov tooj cua tsis zoo. Xov tooj xwm ceevyog ib feem tseem ceeb ntawm ib qho kev sib txuas lus kev thauj mus los thiab tau tsim los daws cov xwm txheej ceev.Txawm hais tias nws yog qhov av lossis txoj kev tsheb ciav hlau, qhov xwm txheej ceev yuav tshwm sim tsis tau npaj txhij, thiab kev sib txuas lus tam sim yog qhov tseem ceeb rau kev teb sai thiab cawm.Los ntawm kev sivxov tooj tsis muaj dej, cov tub ceev xwm thauj tuaj yeem tsim kom muaj kev nyab xeeb thiab ncaj qha ntawm kev sib txuas lus nrog cov neeg caij tsheb, cov neeg tsav tsheb lossis cov neeg saib xyuas thaum muaj xwm txheej ceev.