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.
We learned about honesty and integrity - that the truth matters... that you don't take shortcuts or play by your own set of rules... and success doesn't count unless you earn it fair and square. Michelle Obama
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
We should not look back unless it is to derive useful lessons from past errors, and for the purpose of profiting by dearly bought experience. George Washington