what does bittul torah actually mean, and where is the line

what does bittul torah actually mean? it cannot be that every moment not learning is bittul, so where is the line? is time spent exercising, resting, or just taking care of life considered bittul torah, or does the issur only start when a person could be learning and...

when the wicked fall, is a person supposed to be happy or not

two pesukim in mishlei seem to pull in opposite directions. mishlei 24:17 says בנפל אויבך אל תשמח ובכשלו אל יגל לבך, do not rejoice when your enemy falls, and 24:18 adds the reason: פן יראה ה׳ ורע בעיניו והשיב מעליו אפו, lest hashem see and be displeased and turn his...