Verily, verily, I say unto you, he that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.
But he that entereth in by the door is the shepherd of the sheep.
To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out.

You can't sneak into heaven through a back door.  You can't get there by taking shortcuts.  You can't win a spot in heaven in a lottery.  You have to work at developing you spiritual side.