Bhagavad Gita

ಕ್ರೋಧಾದ್ ಭವತಿ ಸಮ್ಮೋಹಃ ಸಮ್ಮೋಹಾತ್ ಸ್ಮೃತಿವಿಭ್ರಮಃ ।
ಸ್ಮೃತಿಭ್ರಂಶಾದ್ ಬುದ್ಧಿನಾಶೋ ಬುದ್ಧಿನಾಶಾದ್ ವಿನಶ್ಯತಿ ॥೬೩॥
krodhād bhavati sammohaḥ sammohāt smṛtivibhramaḥ |
smṛtibhraṃśād buddhināśo buddhināśād vinaśyati ||63||

Gist of the sloka:
With anger we will desire unwanted, with anger state of mind, we will disregard established dharmas, with the state of forgotten path, we will do unwanted actions and finally this leads us to complete destruction.
Once the Kama [means any desire] is reduced, the roots of anger, grief etc., is also reduced. If we train ourselves to see the pro and cons before proceeding with desiring anything, the desire itself will be found to be wrong and chances of making mistakes reduces. If we think through our emotions [mind] instead of intellect the chances of mistakes increase. Including justifying the very wrong actions/thoughts as right ones. This results in thoughts about revenge which is foolish and finally soul heads into Hell – complete destruction.
Once the intellect is lost, then mind is almost dead. Senses will be on their own free will dictating the terms. This is the surest way to Hell and complete destruction of the soul. If we desire to reach the Lord, then we need to understand the Lord in his glory and truth. Seek his protection. Surrender fully to him; allowing Him to guide us along.
If one constantly thinks about the Lord and the right path, soul will get elevated. Therefore, we need to first control our desires, evaluate the pro and cons, reduce or eliminate over attachment.
It does not imply that one should not show any love and affection, rather show it but understand that the over attraction is not required for a seeker. To have a determined mind, but demanding the particular type or intensity of the result, is excessive moha [attraction]. One should have ‘detached attachment’; meaning have the sense of attachment but not over attachment with passion. This is the source of real happiness.
One should always have peaceful mindset. Without it, the results would be both mental and physical problems in the body. We should face any situation without being unduly worried but with the belief that Lord knows the best. How to achieve it, is in the next verse.