How can you define 'Luck'?

Have you ever considered a fact that some happenings in your life are strangely out of your control? Sometime, somewhere, we witness something that is beyond our human potential to understand and the final verdict we fall into is that we were 'lucky'! Is this what luck is all about? Or is it something beyond our apprehension to consider as a sign or a signal?
It is often said that whatever happens, happens for a reason. Then what could be the possible reason behind 'luck'? An answer no one bothered to find but every person has definitely questioned himself at least once in his life time.... How did it happen?
Believe me, I don't want to sound superstitious or stupid but there are many unseen uncanny things that surround our life and we don't have any evidence for their existence but deep inside, we have a subconscious belief of it's presence.
Most of us must have met or heard some incidents that make us look around for the scientific logic or any reason that could spare us the horror of the unknown. In this present century, we all have associated every happening with some scientific reasoning. But what would you call an incident when you suddenly find yourself unscratched among a disaster? Or when you were hit by a car and you survived without a scratch? Or a night your room was set on fire and you walked out of it unconscious? Or a glass dish that hit you but left you without any wound and broke carefully falling into pieces without piercing your skin?
Believe me, I have witnessed some of them while I was left stupefied in the run to look for a logic. If we work on the other side of the coin, there must be a world within that counterparts our own world. Someone who takes care of us in adversities! Like when a baby is born, it's fragility makes us wonder how could something so tiny make through the initial crucial stages of life. Their tiny limbs have to face the tremendous possibilities of life threatening situations in every step they take, still most of them come out perfectly fine. 
It is of course declared then that the child is 'lucky'! 
My question still persists that what is luck, by the way? Is it about something that's beyond our understanding? Or is it our destiny? Or is it about some unknown power that takes control and protects us? I'm sure each one of us have at least one incident to narrate that failed to declare any logic and you simply announced..... "I WAS LUCKY!"      

Chapter Eight: How does it feel when you lose the love of your life forever!!!!!!!

She saw her body lying there, wounded, torn, oozing in blood wrapped in his arms as if he could save her for himself.

She was dead!

This life had ended!

Her soul was free from the torture, agony and sorrow. She stood there staring at her dead corpse shuddering with the frightful experience of brutality that she had suffered in that life. Suddenly, a beam of light fell on her soul. It was as if the door opened, the door leading to another world where she belonged. Her soul blissfully spread the arms at the light and it cradled her lovingly and pulled her to it. Her spirit floated in the light and in a blink of an eye, the light vanished with her. As if, the door shut after she entered the other world.

 “You’ll be alright, my love. That devil is dead. Please get up.” He cradled her dead corpse and mumbled with tears flowing from his eyes. He kissed her forehead carefully.

  “Get up, Sophie, love.” He checked the pulse, but it had stopped for long.

“NO. You can’t leave me like this. We belong to each other. Please, love, for my sake. Please wake up. Please come back.” He was shaking nervously, crying like a baby.

Suddenly, he started yelling. “You cannot leave me like this. I am sorry. I shouldn't have left you alone. Don’t be so harsh, Sophie. Don’t go, please.” He cried hysterically shaking the dead body like a lunatic.

Suddenly he stopped mumbling. He carefully placed her body on the floor and sat still beside it, staring. I felt my heart beating ferociously. I looked at him. I wanted to console him, but I was just a spectator there. I was unable to touch him. After a while, he stood up and ran out from the house daring not to look back where laid dead the love of his life. He kept running aimlessly till he reached the heart of the woods that was densely dark and scary.

His legs shook with fatigue and treacherously stopped by itself making him stumble harshly on the thorny ground. He curled his body into a ball trying to catch hold of the pain that spread victoriously all over him, killing him steadily inside. He sobbed hysterically and screamed to let go of the agony but it stubbornly bore his serenity.