sentence1: unlike Cain, who was of the evil one and killed his brother. Why did he kill him? Because his deeds were evil, and his brother’s righteous.
sentence2: pApAtmato jAto yaH kAbil svabhrAtaraM hatavAn tatsadR^ishairasmAbhi rna bhavitavyaM| sa kasmAt kAraNAt taM hatavAn? tasya karmmANi duShTAni tadbhrAtushcha karmmANi dharmmANyAsan iti kAraNAt|