One may increase his ambition for sense gratification and even achieve what he desires for the gratification of his senses, but because this is on the material platform, he will never achieve satisfaction and contentment.
According to brahminical culture, one should be content with whatever he obtains without special endeavor and should cultivate spiritual consciousness. Then he will be happy. The purpose of the Kṛṣṇa consciousness movement is to spread this understanding.
(Srimad Bhagavatam--8:19:24--purport).

To teach this highest culture, varṇāśrama-dharma is recommended. The aim of the varṇāśrama divisions—brāhmaṇa, kṣatriya, vaiśya, śūdra, brahmacarya, gṛhastha, vānaprastha and sannyāsa—is to train one to control the senses and be content with the bare necessities. Here Lord Vāmanadeva, as an ideal brahmacārī, refuses Bali Mahārāja's offer to give Him anything He might want. He says that without contentment one could not be happy even if he possessed the property of the entire world or the entire universe. In human society, therefore, the brahminical culture, kṣatriya culture and vaiśya culture must be maintained, and people must be taught how to be satisfied with only what they need. In modern civilization there is no such education; everyone tries to possess more and more, and everyone is dissatisfied and unhappy. The Kṛṣṇa consciousness movement is therefore establishing various farms, especially in America, to show how to be happy and content with minimum necessities of life and to save time for self-realization, which one can very easily achieve by chanting the mahā-mantra—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare.
(Srimad Bhagavatam--8:19:21--purport).

In fact, if one is fortunate enough to understand the happiness and distress of the spirit soul and gets a taste for transcendental knowledge, then he will be indifferent to the happiness and distress of the body and mind and will relish a transcendental peace eternal, even in the midst of worldly happiness and distress. Real peace can be obtained only in that transcendental stage of existence. That is the state of real contentment. If, after a long time, somebody embarks on a homeward journey, the pleasure of being homeward—bound diminishes the accompanying distress of the journey. The inconveniences of traveling become subordinate to the pleasure of heading homeward.
(Message of Godhead).

Where can one see qualities such as intelligence, knowledge, freedom from doubt, joy, sorrow, fear, fearlessness, nonviolence, equanimity,contentment, austerity, charity, fame, and infamy? These qualities are indicative of consciousness, so they are present wherever consciousness is present. The Supreme Lord has declared that these qualities are His, that they have sprung from Him. And the Kaṭha Upaniṣad states, nityo nityānāṁ cetanaś cetanānām eko bahūnāṁ yo vidadhāti kāmān: "Among all the eternal, conscious living entities, there is one supreme conscious being who supplies all others with their necessities."
(Renunciation Through Wisdom).