What's in your heart when come to object oriented?

So many books and articles play with this term, unforturnately I believe you may become more confused after you try hard to "grab a rope" among these staff. My point is OO is an area,a district where the solution locates at, but whilst OO is also not the way to the solution. 

If you ask me "How should I do？”, my answer is another term "DDD". It's a way to the solution within the "OO" district.