Srila Vyasadeva

“When one enjoys the object that is most dear to him, he will certainly face great distress later on. On the other hand, those who remain aloof from such attachment, remaining as akiñcana, are to be known as learned men who are qualified to achieve unlimited happiness.”
― Srila Vyasadeva, Uddhava Gita, Lord Krishna's Final Lessons

“Desire for material enjoyment arises as soon as there is an absence of the propensity to render loving service to the Supreme Lord. This is the root cause of all material miseries. While utilizing this natural propensity for serving the Supreme Lord, one is able to see everything within the material world as meant for the Lord’s enjoyment, rather than his own enjoyment. Thus one sees the material world as an opportunity for engaging in the devotional service of the Lord. In Kṛṣṇa consciousness, one’s conditional life is dissolved, and one become qualified to establish true friendship with other devotees in the course of rendering loving service to the Supreme Lord.”
― Srila Vyasadeva, Uddhava Gita, Lord Krishna's Final Lessons