Sukham, pleasure or happiness, should always be in that which is favorable for the cultivation of the spiritual knowledge of Kṛṣṇa consciousness. And similarly, that which is painful or which causes distress is that which is unfavorable for the cultivation of Kṛṣṇa consciousness. Anything favorable for the development of Kṛṣṇa consciousness should be accepted, and anything unfavorable should be rejected.
-Bhagavad-Gita Chapter 10 Verse 4-5, Purport

युक्ताहारविहारस्य युक्तचेष्टस्य कर्मसु ।
युक्तस्वप्‍नावबोधस्य योगो भवति दु:खहा ॥ १७ ॥
He who is regulated in his habits of eating, sleeping, recreation and work can mitigate all material pains by practicing the yoga system.
-Bhagavad-Gita Chapter 6 Verse 17