In plain words
Through that, weakness of the nerves sets in. From this weakness of the nerves many worries arise. Tensions over things small and big, and through them diseases like blood pressure and diabetes, come. Not only these diseases: the head too is damaged. At times the blood cells inside the head burst and a haemorrhage comes as well. So harm comes from these thoughts.
So checking evil thoughts as far as we can: this is the true human value. This is the true value of being human. We must try to cultivate this very thing. Along with this, only when our education and our conduct go in keeping with our thoughts will our life be a peaceful life. We must not believe that we shall enjoy an ideal life merely by studying. How many people there are who have studied! There are great scientists all over the world. There are great scholars everywhere. There are scholars and ṛṣis like Vālmīki and Vyāsa. All of them put their power to good use only because they kept these thoughts holy. When they turned that same thought onto an evil path, Viśvāmitra and Dhṛtarāṣṭra set a contrary path before the world. So it does not come with education. There is a great difference between education and saṃskāra. There is a great difference between education and saṃskāra. In daily life we have to develop our saṃskāras with effort, through our conduct. So whether we develop saṃskāra or let it wither, we ourselves are the doers. We ourselves are the enjoyers. If we develop right thoughts, fortune lies in our own hands. We must not go about searching for fortune, crying fortune, fortune. Nor must you become lifeless, saying, this is my misfortune, misfortune. If we set our thoughts on the right path, fortune and misfortune are in our hands. You can trample your misfortune underfoot. You can increase your fortune. Both of these are made by man's thoughts, so keep your thoughts as right thoughts. We must enquire every moment into the force of our thoughts. When any single thought comes, you must not at once go into action. Consider whether it is good or bad. Will this bring me a good name or a bad name? Will it nourish my fame and standing, or cut it off? Will it help me to live as a human being in society, or will it harm me? Asking yourself questions like these: chī!