One of the signs of an accepted Ramadan is that our life changes after Ramadan. If my life changes after Ramadan, it means that my Ramadan was correct. If my life becomes better after Ramadan, it means that my Ramadan was correct. But if my life goes back to where it was before Ramadan, then I wasted my Ramadan.
Laylatul Qadr is one of the blessings that we have and the other nations did not have. It is such a great blessing that Allah revealed an entire Surah just to illustrate to us what it is, just to dedicate for us...
The messenger peace be upon him said, «The person that is fasting has two points of happiness, happiness upon opening the fast, and happiness when he meets Allah Almighty».