Yes. This is indeed very popular dialogue from Sholey. It is good that this inspired you. 

I owe my gratitude to Salim - Javed duo, the dialogue writers of Sholay.

True; it is an inspirational dialogue. Fear is death; courage is life.Success is for courageous only.

There is saying in Sanskrit, "Dhirye Sahase Laksmi. ". It says, dame Luck favors those who are courageous .

He who is not so courageous enough to take risks in his life he will not accomplish nothing in life. Life shrinks or expands in relation with level of courage. This message from one of greatest hit of Hindi Cinema summaries real life lessons. 

All credit to Salim - Javed duo, the script writers.

Yeh zindagi chal toh rahi thi ... par tere aane se maine jeena shuru kiya form movies  Aashiqui 2, is my changing.

How dis it change your life? Please give a brief.

I can say that none of the dialouge have changed my life - you just listen , like it and it stays in your mind for a while at the best .Here are some of the ones that I like

“Until you've lost your reputation, you never realize what a burden it was or what freedom really is.”  - Gone with the wind 

and 

Oh Yes the past can hurt and you can either run from it or learn from it - Lion King

and

Life moves pretty fast . If you don't stop and look around once in a while , you could miss it - Ferris