A dictionary of Proverbs (Oxford Paperback Reference)

male see the FEMALE of the species is more deadly than the male.
Mammon see you cannot serve GOD and Mammon.
MAN cannot live by bread alone
With allusion to two biblical passages (both AV): DEUTERONOMY viii. 3 Man doth not live by bread only, but by every word that proceedeth out of the mouth of the Lord doth man live; MATTHEW iv. 4 Man shall not live by bread alone.

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  1875 EMERSON in North American Review May-June 418 Man does not live by bread alone, but by faith, by admiration, by sympathy. 1927 J. BUCHAN Witch Wood iii. Man canna live by bread alone, but he assuredly canna live without it. 1973 Galt Toy Catalogue 35 As the saying goes—Man cannot live by bread alone. "food and drink; life
  

Whatever MAN has done, man may do
There is a similar idea behind 1723 S. CRANSTON in G. S. Kimball Correspondence of Colonial Governors of Rhode Island (1902) I.9 But as the Proverb is what hath been may be againe.

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  1863 C. READE Hard Cash II. xiv. ‘Dark Deeds are written in an unknown tongue called “Lawyerish” .. ; pick it out if you can.’ ‘Whatever man has done man may do,’ said Dr. Sampson stoutly. 1910 ‘SAKI’ Reginald in Russia 14 I fell in love.. with the local doctor’s wife. . . On looking back at past events it seems to me that she must have been distinctly ordinary, but I suppose the doctor had fallen in love with her once, and what man has done man can do. ■possibility and impossibility
  

A MAN is as old as he feels, and a woman as old as she looks
Both parts of the proverb are sometimes used on their own (see also quot. 1990).

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  1871 V. LUSH Thames Journal 27 Aug. (1975) 114 She is always making me out so much older than I am and that’s not fair, for a man is only as old as he feels and a woman is only as old as she looks. 1891 W. MORRIS News from Nowhere iii. ‘How old am I, do you think?’ ‘Well,’ quoth I, ‘I have always been told that a woman is as old as she looks. 1907 Illustrated London News 25 May 794 The adage that a man is as old as he feels, and a woman as old as she looks, may be said to contain much inherent truth. 1990 ‘C. AIRD’ Body Politic (1991) xi. 123 ‘He might still marry.’ Sloan was bracing. ‘A man is only as old as he feels.’ «men and women; old age