We manufacture. The whole material world is going on by manufacturing ideas. The so-called scientists, the so-called philosophers, poets, they are manufacturing ideas that, "We shall be happy in this way, in that way." So this will not help us, this manufacturing. I may be satisfied by some manufactured ideas. Just like in USA especially, the frustrated, confused younger generation, they are manufacturing ideas that, "We shall be happy in this way." But that is not possible. You cannot be happy. So long you manufacture ideas, you may be pacified for some time, but it will not exist.
Therefore you have to stop this manufacturing process that, "I shall be happy in this way." No. That is called free of anxiety. If you want to manufacture that, "I shall be happy in this way," that will also create another anxiety. That will create another anxiety. Therefore Yamunācārya says, praśānta-niḥśeṣa-mano-rathāntaraḥ. Mano-rathāntaraḥ, this particular word, is used, "mind," "on the chariot of mind." In the material stage of life, we are being driven by the chariot of mind.
In the Bhagavad-gītā also, it is stated, bhrāmayan sarva-bhūtāni yantrārūḍhāni māyayā (BG 18.61). Bhrāmayan sarva-bhūtāni. All living entities are traveling within this material world in different species of life, in different planets. Sarva-bhūtāni yantrārūḍhāni māyayā: on the chariot given by the material energy. So that is mind.
So, so long we shall travel on the chariot of the mind, mano-ratha, then there is no question of our being freed from anxiety. Therefore we have to give up this chariot of mind. The chariot of mind will not give us satisfaction. We have to transcend the mental state, the intellectual state. The philosopher, they are intellectually trying to be happy. That also we have to transcend. We have (to) come to the spiritual platform, brahma-bhūtaḥ. And not only come to the spiritual platform; we must have spiritual engagement. That is Kṛṣṇa consciousness.