The eternal struggle to live, and live with the fact that many of us believe that this life doesn't end our existence. Death is one of those sure bets. Even for those who don't feel charged to "believe", there is a lot to say for living life as Christ did. 
For those who don't believe in him: fine. I wont sit here and say your wrong. It's your opinion. Fine.
But know this--
Even if he wasn't what he said he was; what WE believe he was, and is: didn't he try to live life by the best possible rule? Love your neighbor like you love yourself, don't lie, don't wish you had someone or something that someone else has, don't kill each other, etc
Any time anyone lives that way, even non-believers, you honor Christ and have lived like him.
You don't have to believe or be indoctrinated into anything:
Just do what's right.

Palm Sunday, Good Friday... Easter. All the best reasons to post on spirituality. 
In my mind, rituals of friendship, rituals of prayer are only a small part in the play. A gathering of like minded people isn't only about coming together in the same place, it's about a feeling- a desire to understand what it is we're gathering for. 
This life is a doorway, the key to which opens not only life on earth, but pathway to the stars and the universe beyond. 
Love and be loved is the easiest rule.