It depends on how they do good things. If they do good things publicly so that everyone knows they're being "good," they don't even get a spiritual pat on the back. Why? Ego! Selfishness!
Believing in God doesn't cut it either. You've got to do anonymous, selfless acts of kindness and achieve perfect humility, but with perfect faith (confidence in a higher power). You may not even need to understand what that higher power is. Just open the door to it with love and gratitude. This destroys ego, and awakens the true, immortal self within.
The kingdom of heaven is within you already. Ignoring it is too well practiced. So, the real question might be: how do I kick ego's butt and open my heart to infinite love? How's that sound?