Upon any less condition than (the fact or thing stated in the sentence or clause which follows); if not; supposing that not; if it be not; were it not that; except; as, we shall fail unless we are industrious.
Unless we make Christmas an occasion to share our blessings, all the snow in Alaska won't make it 'white'. Bing Crosby
Change does not roll in on the wheels of inevitability, but comes through continuous struggle. And so we must straighten our backs and work for our freedom. A man can't ride you unless your back is bent. Martin Luther King, Jr.
Unless someone like you cares a whole awful lot, nothing is going to get better. It's not. Dr. Seuss
God will not permit any troubles to come upon us, unless He has a specific plan by which great blessing can come out of the difficulty. Peter Marshall