The context is that the apostle Paul is telling us that when we accept Jesus we become apostles for Christ also. We are not to let the world judge us, but let Christ's words and deeds be what we judge ourselves by.
This verse spoke to me about our homeschool today. When we started on this journey it was with the understanding we were going all the way thru high school. People all the time ask me when we are putting B in school. Usually I tell them he is in school just an alternative form! I always say that until God leads me another direction, this is the one we are on. Well today it was like God was validating our decision with this verse.
He gave us a trust when we began this journey and for us, we are required to be faithful. That means when opposition start talking, we stand; when I get tired, we stand; when it seems nothing is sinking in, we stand.
My prayer is that we will be faithful to the end!