will not open the game of minecraft

will not open the game of minecraft

What I expected to happen was open the game to play after i put in a new texture pack (sphax)
I thought I was gonna open and play on the texture pack of Sphax

*What actually happened was the game wouldn't open and crashed
When going to restart the game to use the new texture pack, it crashed and will not allow me to open the game

Steps to Reproduce:
1. open the game
2.it crashes