I picked this story up a while ago. It works for me.
A man went to a barbershop to have his hair cut and his beard trimmed. As the barber began to work, they began to have a good conversation. They talked about so many things and various subjects.You can always pray to the God who might exist, and ask Him to prove to you that He does. He loves to reach out to those who show Him the slightest interest in His Love or the possibility that He and His Love exist. A mustard seed of interest in Him can lead to a mountain of His presence, and unassailable proof that He not only loves you, but does so far better than you can do yourself.
When they eventually touched on the subject of God, the barber said: 'I don't believe that God exists.'
'Why do you say that?' asked the customer.
'Well, you just have to go out in the street to realize that God doesn't exist. Tell me, if God exists, would there be so many sick people? Would there be abandoned children? If God existed, there would be neither suffering nor pain. I can't imagine a loving God who would allow all of these things.'
The customer thought for a moment, but didn't respond because he didn't want to start an argument. The barber finished his job and the customer left the shop.
Just after he left the barbershop, he saw a man in the street with long, stringy, dirty hair and an untrimmed beard. He looked dirty and unkempt. The customer turned back and entered the barber shop again and he said to the barber:
'You know what? Barbers do not exist.'
'How can you say that?' asked the surprised barber. 'I am here, and I am a barber. And I just worked on you!'
'No!' the customer exclaimed. 'Barbers don't exist because if they did, there would be no people with dirty long hair and untrimmed beards, like that man outside.'
'Ah, but barbers DO exist! That's what happens when people do not come to me.'
'Exactly!' affirmed the customer. 'That's the point! God, too, DOES exist! That's what happens when people do not go to Him and don't look to Him for help. That's why there's so much pain and suffering in the world.'
(WE MUST GO TO THE LORD TO KNOW HE EXISTS. IT IS THAT SIMPLE). BUT JUST BECAUSE SOME ONE DOES NOT GO TO HIM, DOES NOT MEAN HE DOES NOT EXIST. HE JUST REFUSES GOD'S HELP.