I think there is nothing impossible in this world, and you would never find it in the dictionary of a successful person. Impossible is the word mostly said by unsuccessful people, who don’t have the courage to do something remarkable in their life.
The more you think about “Impossible”, the stronger and larger it becomes.
Here are some stories that inspire me and which demonstrate that impossible is just a myth and only exists in our mind.
Heavier-than-air flying machines are impossible – Lord Kelvin – 1895
Lord Kelvin, also known as William Thomson, was a great mathematical physicist and engineer. He is known for the Planck statement (or the Heat Engine Statement) of the second law of thermodynamics which states that it is impossible to devise a cyclically operating heat engine, the effect of which is to absorb energy in the form of heat from a single thermal reservoir and to deliver an equivalent amount of work.

He once stated that “Heavier-than-air flying machines are impossible” but Wright brothers proved him wrong with their first controlled, sustained flight of a powered, heavier-than-air aircraft with the Wright Flyer on 17 December 1903. In 1904–05, the brothers developed their flying machine to make longer-running and more aerodynamic flights with the Wright Flyer II.
Again, someone proved a myth wrong.
To be successful at something you don’t have to be unique, you have to be what most people aren’t: CONSISTENT.
You Will Never Walk Again – Wilma Rudolph
Wilma Rudolph was a sickly child who had to wear a brace on her left leg. She was suffering from a disease called “poliomyelitis”, and the doctor told her that you will never walk again, she was disappointed. But, her mother told her otherwise.
In 1960, Wilma Rudolph became the first American woman to win three gold medals in track and field at a single Olympics.

Just look at the determination and the courage of these people, like they only knew what needs to be done, no matter what other people, science, circumstances tell them to do. Still, they have done precisely the opposite and turned an impossible task into a possible one.
A Deaf Music Composer – Ludwig van Beethoven
Beethoven was a German composer and pianist; his music is amongst the most performed of the classical repertoire, and he is one of the most admired composers in the history of Western music. His works span the transition from the classical period to the romantic era in classical music.

Yes, Ludwig van Beethoven was a music composer with hearing disabilities, can you imagine how impossible it looks like.
The sense of hearing is one of the most and essential aspects if you are a music composer, how someone could produce music when he is not able to listen to it?
Arunima Sinha – World’s first woman to scale Mount Everest
Aruna Sinha is an Indian mountain climber and sportswoman.
Once she boarded the Padmavati Express train at Lucknow for Delhi on 12 April 2011, to take an examination to join the CISF. She was pushed out of a general coach of the train by robbers wanting to snatch her bag and gold chain.
During her interview, she said: I resisted, and they pushed me out of the train. I could not move. I remember seeing a train coming towards me. I tried getting up. By then, the train had run over my leg. I don’t know anything after that.
Later, she was rushed to the hospital with severe leg and pelvic injuries and lost her leg after doctors amputated it to save her life.

But I’d say that she is a woman with lots of guts, being a disabled person she decided to climb the Mount Everest and she reached the summit of Mount Everest at 10:55 am on 21 May 2013.
More than 200 dead bodies are still there on Mount Everest, and most of the finest athletes couldn’t achieve what she has performed with her one leg. Sounds Amazing!
The world is full of such real success stories, where things look impossible, but some of the real warriors and heroes made it. You just need to think “I can”, “I have to”, “I will”, and then I don’t think there is anything that can stop you to achieve what you want.