《左传·文公·文公十二年》
赵氏有一个旁支的子弟名叫穿，是晋国国君的女婿，受到宠信而年少，不懂得作战，喜好勇猛而又狂妄，又讨厌臾骈作为上军的辅佐。如果派出一些勇敢而不刚强的人对上军加以袭击，或许还有可能战胜赵穿。 
赵有侧室曰穿，晋君之婿也，有宠而弱，不在军事，好勇而狂，且恶臾骈之佐上军也，若使轻者肆焉，其可。 
Zhao Shi's collateral offspring, whose name was Chuan, was the son-in-law of the monarch of Jin. He was favored and grew up young and ignorant of warfare. He was fond of valor and recklessness. He also despised Yu Bian as the assistant of the top military strategist. If some brave but not obstinate men were dispatched to attack the top military strategist, it might be possible to defeat Zhao Chuan. 
<s>[INST] Kindly elucidate the central themes in this passage in English: 赵有侧室曰穿，晋君之婿也，有宠而弱，不在军事，好勇而狂，且恶臾骈之佐上军也，若使轻者肆焉，其可。  [/INST] Zhao Shi's collateral offspring, whose name was Chuan, was the son-in-law of the monarch of Jin. He was favored and grew up young and ignorant of warfare. He was fond of valor and recklessness. He also despised Yu Bian as the assistant of the top military strategist. If some brave but not obstinate men were dispatched to attack the top military strategist, it might be possible to defeat Zhao Chuan. </s>
Kindly elucidate the central themes in this passage in English: 赵有侧室曰穿，晋君之婿也，有宠而弱，不在军事，好勇而狂，且恶臾骈之佐上军也，若使轻者肆焉，其可。
user
Zhao Shi's collateral offspring, whose name was Chuan, was the son-in-law of the monarch of Jin. He was favored and grew up young and ignorant of warfare. He was fond of valor and recklessness. He also despised Yu Bian as the assistant of the top military strategist. If some brave but not obstinate men were dispatched to attack the top military strategist, it might be possible to defeat Zhao Chuan.
assistant