It's not by Columbus. It's a misquote of a line from Andre Gide's 1925 novel The Counterfeiters (Les faux-monnayeurs): "On ne découvre pas de terre nouvelle sans consentir à perdre de vue, d'abord et longtemps, tout rivage" ("One doesn't discover new lands without consenting to lose sight, for a very long time, of the shore").
Metaphorically, undoubtedly the meaning intended is "you won't make any major breakthroughs unless you're prepared to let go of the safe and familiar".
But as a nautical metaphor, it stinks. Commodore Collins of the British Admiralty * said that whoever coined the idea that sailors pre-Columbus stayed within sight of the shore had clearly never been to sea. Sailors from even the most primitive of cultures know that "coast-hugging" is very dangerous, so it's a poor metaphor for safety.
* Cited in Clifford D. Conner's "A People's History of Science: Miners, Midwives, and Low Mechanicks"
it means to me that can never get something unless you work fo it and try hard for getting
That is difficult and unless you summon up the courage to go up to him and say "Hi" things will never develop. Take courage and go and talk to him, - what have you got to lose!
never never Columbus never did magic, if you aren't talking about Christopher Columbus you need to be more pacific.
he never traveled to Columbus!
Never, Double solid yellow means that you cannot cross
You're going to have to build-up the courage to ask them or nothing will never happen unless the person likes you already.
Mary Mckillop showed courage by never giving up.
Homer Simpson is a male, unless he is secretly a cross-dresser lesbian. The show has never reveled him/her as a female.
If you do not have the gift of courage, you will never be able to face any challenges in your life that you mustcomplete.
christopher Columbus was never a president
Columbus made 4 to the Bahamas. He never got to America.
Parallel lines never intersect/cross.
Diverging lines are not parallel and never cross.