It's important to maintain good relationships with your friends, but it's equally important to understand your enemies.
保持与朋友的良好关系非常重要，但理解你的敌人也同样重要。 (Bǎochí yǔ péngyǒu de liánghǎo guānxì fēicháng zhòngyào, dàn lǐjiě nǐ de dírén yě tóngyàng zhòngyào.)
"He always watches his competitors carefully because he believes in keeping your friends close and your enemies closer."
"他总是小心地观察竞争对手，因为他相信保持朋友在身边，敌人更靠近。" (Tā zǒng shì xiǎoxīn de guānchá jìngzhēng duìshǒu, yīnwèi tā xiāngxìn **bǎochí péngyǒu zài shēnbiān, dírén gèng kàojìn**.)
to discover the main cause of a problem
to feel responsible for many problems or duties
you get the results of your actions, good or bad
to feel sad or depressed
a small indication of what the future might be like
to admit your mistake and apologize
