Happiness as Understood from the Sunnah

The faces of the old and young – and indeed even the trees and birds around us – rejoice when they come to know about the happiness of the beloved Prophet (peace be upon him). This is because his happiness is happiness for those who love him, and guidance for those who follow him. So, let us learn the perfect etiquette and the wonderful guidance of the Prophet (peace be upon him) in times of delight.

Conversion Story of Alexander R. Webb (USA)

I might reply promptly and truthfully that I adopted this religion because I found, after protracted study, that it was the best and only system adapted to the spiritual needs of the humanity. And here let me say that I was not born as some boys seem to be, with a fervently religious strain in my character. When I reached the age of 20, and became practically my own master, I was so tired of the restraint and dullness of the Church that I wandered away from it and never returned to it.