<photo: Tube station, London Underground>
"light at the end of the tunnel" is an English idiom that means "signs of improvement in a situation that has been bad for a long time, or signs that a long and difficult piece of work is almost finished."
"light at the end of the tunnel" gives hope, provides encouragement and makes you put in that extra effort to make it to the finishing line, to reach the summit.
"light at the end of the tunnel" could also mean that it's an oncoming train and you are standing in its path.
”Destiny is not a matter of chance, it is a matter of choice; it is not a thing to be waited for, it is a thing to be achieved.” – Winston Churchill