M.K.Gandhi

 
"...I became more than ever convinced that it was not the sword that won a place for Islam in those days in the scheme of life. It was the rigid simplicity, the utter self-effacement of the prophet, the scrupulous regard for his pledges, his intense devotion to his friends and followers, his intrepidity, his fearlessness, his absolute trust in God and his own mission. These and not the sword carried everything before them and surmounted every trouble." 

 While speaking on the character of Muhammad, peace and blessings be to him, said in Young India:

“I wanted to know the best of one who holds today undisputed sway over the hearts of millions of mankind… I became more than convinced that it was not the sword that won a place for Islam in those days in the scheme of life. It was the rigid simplicity, the utter self-effacement of the Prophet, the scrupulous regard for his pledges, his intense devotion to his friends and followers, his intrepidity, his fearlessness, his absolute trust in God and in his own mission. These and not the sword carried everything before them and surmounted every obstacle. When I closed the 2nd volume (of the Prophet’s biography), I was sorry there was not more for me to read of the great life.”