“What we do for ourselves dies with us. What we do for others and the world remains and is immortal.”
"1860. In Lodge of Sorrow at Washington: March 30.", p. 11 <!-- [books.google.com/books?id=PTpRwZ1yEWwC&pg=PA11&dq=What+we+have+done+for+ourselves+Albert+Pike&hl=en&sa=X&ei=akWkT_3QCqLA6AHG_7G6CQ&ved=0CDcQ6AEwAA#v=onepage&q=remains immortal&f=false page 11] -->
In sentiment this is similar to the expression made much earlier by Giordano Bruno in On the Infinite Universe and Worlds (1584) : "What you receive from others is a testimony to their virtue; but all that you do for others is the sign and clear indication of your own."
Ex Corde Locutiones: Words from the Heart Spoken of His Dead Brethren
Variant: What we have done for ourselves alone dies with us; what we have done for others and the world remains and is immortal.
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Albert Pike 88
Confederate States Army general and Freemason 1809–1891Related quotes

Earliest instance of this quote found on google books is the 1989 book Forest primeval: the natural history of an ancient forest by Chris Maser, but there it appears to be Maser's own thought (see p. 230 http://books.google.com/books?id=8EAHQM54E5gC&q=%a+mirror% followed by a different supposed Gandhi quote http://books.google.com/books?id=8EAHQM54E5gC&q=gandhi).
Disputed

Context: To think what we do not feel is to lie to ourselves, in the same way that we lie to others when we say to others what we do not think. Everything we think must be thought with our entire being, body, and soul.

Nous désirons passionnément qu'il y ait une autre vie où nous serions pareils à ce que nous sommes ici-bas. Mais nous ne réfléchissons pas que, même sans attendre cette autre vie, dans celle-ci, au bout de quelques années, nous sommes infidèles à ce que nous avons été, à ce que nous voulions rester immortellement.
Pt. II, Ch. 2
In Search of Lost Time, Remembrance of Things Past (1913-1927), Vol. IV: Cities of the Plain (1921-1922)

1950s, Address at the Philadelphia Convention Hall (1956)

“We always condemn ourselves by what we say, not by what we do.”
Nos condenamos siempre por lo que decimos, no por lo que hacemos.
Source: Todas las Almas [All Souls] (1989), p. 31