Be satisfied with the quota that God has set aside for you

One should accept only those things that are set aside by the Lord as his quota. The cow, for instance, gives milk, but she does not drink that milk: she eats grass and straw, and her milk is designated as food for human beings. Such is the arrangement of the Lord. Thus we should be satisfied with those things He has kindly set aside for us, and we should always consider to whom those things we possess actually belong.

– Srila Prabhupada, Sri Isopanishad Mantra 1