We read in Matt. 25:34-40 (Jesus speaking): "Then the King will say to those on his right, 'Come, you who are blessed by my Father, inherit the kingdom prepared for you from the foundation of the world. For I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you welcomed me, I was naked and you clothed me, I was sick and you visited me, I was in prison and you came to me.' Then the righteous will answer him, saying, 'Lord, when did we [do all these things]?' And the King will answer them, 'Truly, I say to you, as you did it to one of the least of these my brothers, you did it to me.'"
Notice that the blessed followers are surprised. This is not because they didn't realize they were helping the poor or the sick. Of course they knew that! They were simply doing what they would normally have done – what they didn't realize was that, in doing just what they had always done, they were showing generosity to Christ!
Our responsibility as Christians is not to figure out how to 'find out where God is' and then become generous. Our responsibility is to begin living generously, developing a heart like Jesus' – and when we do, we will find God, sometimes in surprising places!