A full cup must be carried steadily.

Related:

• A full cup must be carried steadily.
  English...
• Everyone must row with the oars he has. --
  English...
• He that would the daughter win, Must with the mother first begin.
  English...
• When the cup is full,
  carry it even...
• When the cup is full,
  carry it level...
• In for a penny, in for a pound.
  English...
• Half a cup of water is half-full,
  with air...
• A book is like a garden carried in the pocket.
  Chinese...