A dictionary of Proverbs (Oxford Paperback Reference)

grey see also all CATS are grey in the dark.
grieve see what the EYE doesn’t see, the heart doesn’t grieve over; do not grieve that ROSE-TREES have thorns...
grind see the MILL cannot grind with the water that is past; the MILLS of God grind slowly, yet they grind exceeding small.
gripping see NOTHING should be done in haste but gripping a flea.
All is GRIST that comes to the mill
Everything that is received or obtained is put to use. Grist is corn to be ground. The is freqently replaced by a possessive pronoun or phrase. Similar to the older all is FISH that comes to the net. The metaphorical expression grist to one’s mill is also found.

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  1655 T. FULLER Church Hist. Britain III. iii. Forein Casuists bring in a bundle of mortal sins, all grist for their own Mill. 1770 S. FOOTE Lame Lover I. 28 Well, let them go on, it brings grist to our mill: for whilst both the sexes stick firm to their honour, we shall never want business. 1896 A. WHYTE Bible Characters I. xii. Your stumble, your fall, your misfortune.. all is grist to the mill of the mean-minded man. 1943 A. CHRISTIE Moving Finger ix. You’re failing to allow for the mentality of a Poison Pen— all is grist that comes to their mill. 1979 G. MITCHELL Mudflats of Dead iii. All was grist which came to a novelist’s mill, and he was still hoping that something, somewhere, would bring him what he still thought of as inspiration. 2000 ‘G. WILLIAMS’ Dr. Mortimer and Aldgate Mystery (2001) xviii. 94 ‘I should very much like to know,’ she said, ‘what picture was there that Agar felt was so eminently worth stealing. In my pursuit of him, all is grist to my mill.’ "gains and losses; opportunity
  

ground see BETWEEN two stools one falls to the ground.
grow see while the GRASS grows, the steed starves; GREAT oaks from little acorns grow; ONE for the mouse, one for the crow.