Throughway to Happiness
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years ago may suddenly come to our mind for no apparent reason. These thoughts come from our subconscious, and because they are always rising, the mind is always agitated. If we agitate a lake or a pond, all the mud from the bottom comes to the surface. Similarly, when the mind is agitated so many thoughts arise from the subconscious that have been stored there over the years. If we do not disturb a pond, the mud will settle to the bottom. This  yoga  process is the means to quiet the mind and allow all these thoughts to settle. For this reason there are so many rules and regulations to follow in order to keep the mind from becoming agitated. If we follow the rules and regulations, gradually the mind will come under control. There are so many don't's and so many do's, and if one is serious about training the mind, he has to follow them. If he acts whimsically, what is the possibility of the mind being controlled? When the mind is finally trained to the point where it will think of nothing but Kṛṣṇa, it will attain peace and will become very tranquil.
praśānta-manasaṁ hy enaṁ yoginaṁ sukham uttamam upaiti śānta-rajasaṁ brahma-bhūtam akalmasam
“The  yogī  whose mind is fixed on Me verily attains the highest happiness. By virtue of his identity with Brahman, he is liberated; his mind is peaceful, his passions are quieted, and he is freed from sin.” (Bg. 6.27)