"I expect to pass through life but once. If therefore, there be any kindness I can show, or any good thing I can do to any fellow being, let me do it now, and not defer or neglect it, as I shall not pass this way again." — William Penn (1644-1718)

Then shall the King say unto them on his right hand, “Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world:

For I was a hungry, and ye gave me meat:

I was thirsty, and ye gave me drink:

I was a stranger, and ye took me in:

Naked, and ye clothed me:

I was sick, and ye visited me:

I was in prison, and ye came unto me.” 

Then shall the righteous answer Him, saying, “Lord, when did we see Thee hungry, and feed Thee?  Or thirsty, and gave Thee drink?

When did we see Thee a stranger, and took Thee in? Or naked, and clothed Thee?

Or when did we see Thee sick, or in prison, and came unto Thee?” 

And the King shall answer and say unto them, “Verily I say unto you, Inasmuch as ye have done it unto one of the least of these My brethren, ye have done it unto me.” —Matthew 25:34-40

We also obey Christ's command on how we should address each other and what titles we should or should not use:

“But be not ye called Rabbi: for one is your Master, even Christ; and all ye are brethren.” —Matthew 23:8

“And call no man your father upon the earth: for one is your Father, which is in heaven.” —Matthew 23:9

“Neither be ye called masters: for one is your Master, even Christ.” Matthew 23:10

“But he that is greatest among you shall be your servant.” —Matthew 23:11

“And whosoever shall exalt himself shall be abased; and he that shall humble himself shall be exalted.”  —Matthew 23:12