Bhagavad Gita

ಧ್ಯಾಯತೋ ವಿಷಯಾನ್ ಪುಂಸಃ ಸಂಗಸ್ತೇಷೂಪಜಾಯತೇ ।
ಸಂಗಾತ್ ಸಂಜಾಯತೇ ಕಾಮಃ ಕಾಮಾತ್ ಕ್ರೋಧೋSಭಿಜಾಯತೇ ॥೬೨॥
dhyāyato viṣayān puṃsaḥ saṃgasteṣūpajāyate |
saṃgāt saṃjāyate kāmaḥ kāmāt krodhoSbhijāyate ||62||

Gist of the sloka:
One who keeps thinking about an object/event, will eventually will be attracted towards it. He then builds a relationship with it. With the relationship, he will desire it. If he does not obtain it, he will get even greater anger/grief because of it.
If we hear about an object/place, we develop interest in it. With the interest, we develop the need to attraction [moha] with it. With the attraction, we feel the need to feel/see it [sparsha]. With the sense of touching it, we feel we need to possess it. With the feeling of possessing it, we feel we need to take whatever actions are required to make it our own. These actions might be already causing us papha.
If we obtain the object, we feel even more possessiveness with it and neglect others. If we don’t obtain it, we either feel dejected or anger. This entire path would disturb the mental equilibrium and cause various diseases [BP etc.,] or situations [Depression etc.,]. Both of which are sure ways to be away from the Lord’s, chosen path.
If we go back to the origin, we realize it was the desire, which caused us to get on to this wrong path. Controlling the desire gives us better chance to succeed.
This cycle of getting to know and with actual result, we have strayed from the path and committed numerous karmas, wasted energy, time and efforts and performed various actions not sanctioned by the Lord. The same could have been utilized towards reaching the Lord.
If the object was Lord then the same could have resulted in elevation of the soul and pleasure of the Lord. The Lord ever merciful would always be with his devotees and the chance to feel dejected or anger would never arise.