It's your seal

Today at the restaurant I gave a tract to somebody and one of my old students from the Bible college points to me and says with a big smile, "Es tu sello" (it's your seal). What he was saying was that it was like my signature or something that marked me. You know, like when a political figure of days past would send and important letter, he would have a special seal that distinguished that the letter was from him. It made me feel real special to hear my student make that comment: may my life be distinguished my many Christian seals like passing out tracts, reading the Bible, praying, always being faithful to church services, etc.