In plain words
In the end it destroys the tree itself. So you must see that creepers called lust, anger, greed and delusion do not twine round humanity.
Every person must try to keep his senses under control
Rāvaṇa had recited and studied the Vedas and Śāstras at length; he was rich in great power, a great ascetic; yet however much he advanced, though he had learnt the sixty-four arts, because the creeper called 'lust' twined round Rāvaṇa too, he fell into utter ruin. Not only himself, he reduced his kingdom too to ashes. So, without purity of the citta, however many kinds of sādhana you do, there is no gain. That is why Tiruttoṇḍāzhvār too said, "It is not with flowers that I worship You; I worship You with purity of the citta, Swami." Purity of the citta is a herb most needed by man. Without this purity of the citta, when you give bad qualities room in it, even your sādhana goes to waste. The second is anger. Hiraṇyakaśipu kept growing anger not only against ordinary men but against God. Hiraṇyakaśipu was rich in great power. Hiraṇyakaśipu was the one who brought the five elements into his grasp and played with them. Even Hiraṇyakaśipu, who had such strength and capacity, was ruined in every way because the bad quality called 'anger' entered him. Duryodhana was a king of kings, very mighty, a brave and valiant man; yet however much he had, greed entered him. Because this 'greed' entered him, he was ruined in every way. He destroyed his own line. The workings of lust, anger and greed are seen plainly in this way. Then delusion. Kaikeyī brought up Rāmacandra with fondness beyond measure, more than her own son Bharata. Mantharā, telling tales in many ways, hardened the mind of Kaikeyī, who had such Prema. She turned this attachment from Rāma to Bharata. Through this attachment she brought disgrace on her kingdom.