Friendship is like vitamins, we supplement each other's minimum daily requirements
— Unknown

I studied chemical engineering. I was a good student, but these were the hard times of the depression, my scholarship came to an end, and it was necessary to work to supplement the family income.
Jack Steinberger supplements quote

Art is not merely an imitation of the reality of nature, but in truth a metaphysical supplement to the reality of nature, placed alongside thereof for its conquest.
— Friedrich Nietzsche

Global thinking and local action both require understanding of ecological systems, but ecological management can be effective only if it takes into consideration the visceral and spiritual values that link us to the earth. Therefore ecological thinking must be supplemented by humanistic value judgments concerning the effect of our choices and actions on the quality of the relationship between humankind and earth, in the future as well as in the present.
— Ren

To the old saying that man built the house but woman made of it a home might be added the modern supplement that woman accepted cooking as a chore but man has made of it a recreation.
— supplements quotation by Emily Post