Nobody could ever define Bliss. Intense feeling like Bliss can not be put in words since scope of language is limited to express something infinite as bliss.
But one thing everybody who ever starts feeling bliss says that purpose of life is to feel bliss. The scope to define bliss is certainly limited but how to feel bliss could definitely be explained.
To understand ways to feel bliss, one must understand that life is a pendulum of celebration, which moves between sex and death. Each breath gives an opportunity to celebrate life.
One who celebrates life with each breath cycle realizes that bliss lies in oneness. It does not matter oneness attained with sex, dance, music or even death. Only in celebrations, one goes beyond the thought and fall into the kingdom of bliss.
One must accept each moment the way it is and must live it with full intensity to make it celebration. One must accept any act from sex to death in any moment with love and must perform each act with celebration to feel bliss.
Most of times our corrupted mind start judging acts. In process of judging we move far away from intense feeling as bliss.
I hope one day human would stop judging and start celebrating each moment of life, which comes with each breath cycle to feel the bliss lies in moment.
I hope one day human would realize that any act from sex to death, which is being offered to life, is a celebration and the whole purpose of every moment and every act is to feel bliss.