My teacher posed the following question the other day:

“Buddha said there are two indications of becoming enlightened.  One is that little things no longer bother you.  What is the second?”

My answer is as follows:

The second is no longer contemplating whether you are enlightened or not.

From my teacher

I wasn't even close. : )

According to my teacher, the answer he had in mind was:  Understanding the oneness or interconnectedness of everything. 

For me, the word interbeing (Thích Nhất Hạnh) sums up this idea best.