There was a boy named Jatila. He had to walk through the jungle everyday to reach his school. Going through the thick woods to the school and coming back again from the jungle all alone was huge task for the kid. Naturally it was a frightening experience many a times.
He told about his fear while going through through the woods to his mother. The mother was a woman with great faith in God.
Accordingly she said to the boy, “Dear child, why get frighten?” “You are not alone. Just call Madhusudana (One of many names attributed to Lord Krishna) and he will be there with you.
The guileless child had the imbibed the Faith from his mother. So from next day as he entered the jungle with deep faith from his heart called out Madusudana. He called, “Oh Madusudana please come and walk with me through the woods.
Alone i am scared. You are my only friend to whom i can call for.” And God listened to this straightforward call full with faith. The faith of boy was such that Madusudana always remained with him, talked with him during the daily journey through the woods.
So if one has total faith in God, God appears in the form the devotee wishes to see him, or even makes the presence felt as formless divine energy.