I couldn't care less what Gandhi said. He wasn't a Christian. Here's a much better reason to serve:
(Matthew 25:34-40 NIV) "Then the King will say to those on his right, 'Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world. {35} For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink, I was a stranger and you invited me in, {36} I needed clothes and you clothed me, I was sick and you looked after me, I was in prison and you came to visit me.' {37} "Then the righteous will answer him, 'Lord, when did we see you hungry and feed you, or thirsty and give you something to drink? {38} When did we see you a stranger and invite you in, or needing clothes and clothe you? {39} When did we see you sick or in prison and go to visit you?' {40} "The King will reply, 'I tell you the truth, whatever you did for one of the least of these brothers of mine, you did for me.'
I agree that is a great scripture for that. I just chose the Gandi quote because I thought it fit the poem and I found the image online. The Gandhi quote is still correct though. Just because someone was not a Christian does not mean they have no wisdom. Thanks for the comment!