“ When a man completely relinquishes all desires of the mind and is entirely contented in the self, by the self, he is then considered to be settled in wisdom ”
Source: Bhagavad Gita 2:55
Undoubtedly the mind is fickle and unruly; but by yoga practice and by dispassion, the mind may nevertheless be controlled.
That person realizes peace who, relinquishing all desires, exists without craving and is unidentified with the mortal ego and its sense of "mine-ness."
He is full with contentment who absorbs all desires within, as the brimful ocean remains unmoved by waters entering into it
Whenever and wherever the restless and unsteady mind wanders, one should bring it back and continually focus it on the self
Just as a lamp in a windless place does not flicker, so the disciplined mind of a yogi remains steady in meditation