The Stranger Old Man

When i praying at mosque in Jatinegara, there is an old man sitting near to me, then he asked to me,
"where are u come from ?"
"from IT Telkom Bandung sir"
then he tell me
"ISLAM is clean religi, like this mosque every day clean, so if you are be a "pejabat" you must be clean like ISLAM, remember it"
so. i just say, "amin sir" i dont know why he tell me those words, but it give me a lot spirit for this white life.