Related:

• You never know what is enough until you know what is more than enough. -- William Blake
• We do what we can but it's never enough.
• We are what we are and it's never enough. -- Chris de Burgh
• We know what we are, but know not what we may be. -- William Shakespeare, Hamle
• Well we know where we're going, but we don't know where we've been, and we know what we're knowing, but we can't say what we've seen .
  .. we're on the road to nowhere. -- Talking Head...
• Know thyself. Nothing in excess. Never do ourselves what we blame in others.
  Love thy neighbor. -- Thales of Miletus (640?-c.546 BCE) attributed by Solon and others....
• What is now proved was once only imagin'd. -- William H. Blake (1757-1827)
• The surest road to health, say what they will, Is never to suppose we shall be ill
  Most of those evils we poor mortals know, From doctors and imagination flow....
• We know what happens to people who stay in the middle of the road.
  They get run over. -- Aneurin Beva...