The Vedas are compared to the desire tree because they contain all things knowable by man. They deal with mundane necessities as well as spiritual realization. The Vedas contain regulated principles of knowledge covering social, political, religious, economic, military, medicinal, chemical, physical and metaphysical subject matter and all that may be necessary to keep the body and soul together. Above and beyond all this are specific directions for spiritual realization.
-Shrimad Bhagavatam Canto 1 Chapter 1 Verse 3, Translation and Purport

जितात्मन: प्रशान्तस्य परमात्मा समाहित: ।
शीतोष्णसुखदु:खेषु तथा मानापमानयो: ॥ ७ ॥
For one who has conquered the mind, the Supersoul is already reached, for he has attained tranquillity. To such a man happiness and distress, heat and cold, honor and dishonor are all the same.
-Bhagavad-Gita Chapter 6 Verse 7