Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 33

Sanskrit:

अलब्ध्वा न विषीदेत काले कालेऽशनं क्व‍‍चित् ।लब्ध्वा न हृष्येद् धृतिमानुभयं दैवतन्त्रितम् ॥ ३३ ॥

ITRANS:

alabdhvā na viṣīdetakāle kāle ’śanaṁ kvacitlabdhvā na hṛṣyed dhṛtimānubhayaṁ daiva-tantritam

Translation:

If at times one does not obtain proper food one should not be depressed, and when one obtains sumptuous food one should not rejoice. Being fixed in determination, one should understand both situations to be under the control of God.

Purport:

Because we desire to enjoy the material body, the varieties of material experience bring us flickering happiness and inevitable suffering. We foolishly consider ourselves to be controllers and doers, and thus through false egotism we are subjected to the volatile feelings of the material body and mind.