"To live is to die"
That's a Metallica song.
"When a Man Lies He Murders
Some Part of the World
These Are the Pale Deaths With
Which Men Miscall Their Lives
All this I Cannot Bear
to Witness Any Longer
Cannot the Kingdom of Salvation
Take Me Home?"
Life, and everything else, is a continous reaction. Your thoughts, feelings, motion, colors and everything is based on chemical and physical reactions.
Our lives are a response to previous actions that have conditioned everything we do now in a "mathematical" way.
Even these thoughts have a reason. They are the product of an overwhelmed reason, our staring back at what makes us different from the other animals - thought. Instincts are probably the best way to intuit the meaning of life, but in order to succeed as an animal we've been given a suplementary conscience, that, in its constant reasoning, seems sometimes unable to attribute a solid meaning to living. The truth is, it does give a good answer, it just doesn't come in words. It's enough to keep us living, hunting, eating, reproducing, etc.
There is life after death. It's been proven scientifically. Upon your death (and life) you feed and give birth to other living beings. Not referring to human beings alone, but to bacteria, mice, and the other animals as well. Most everything in your body will be eventually used by other living beings. If you consider your life as your mind, then it's true that it will live on as well. It might take a different form though. Or thousands of them.
If you consider you have a soul that will stay the same, and migrate to another body in its exact state... Well, in the universe everything is subject to change. So discard that idea already

I believe you can live your life as you wish. Prepare for the afterdeath, live life to its fullest, be a criminal, whatever. You'll have to deal with the conditions human life imposes on you anyway and then suffer the consequences.