It comes from Hebrews, and it says "He [Moses] chose to share the oppression of God's people instead of enjoying the fleeting pleasures of sin." 11:25
Before I did any more thinking about this verse, I looked up the definition of "fleeting"--and my handy dandy app on my iPhone said that it means passing swiftly; vanishing quickly; transient and transitory. So, in other words, that it's not here to stay, it will be gone soon.
The reason why I am pondering on this verse so much is because it is something we, as Christians, could look to in today's society as encouragement. Look at all what Moses had to go through throughout his life time, and he still chose to be with the Father instead of the world. We as Christians in today's society are faced with the same decision. We are choosing to be the group that the world sometimes calls "weird" or "different" or "out of touch". I don't think you could consider those opinions necessarily oppression, but that isn't to say there isn't oppressed Christians in the world today. The other concept that I pull out of this particular verse is that it somewhat goes with Psalm 100:5, "For the Lord is good. His unfailing love continues forever, and his faithfulness continues to each generation." It doesn't directly tie into that verse, but if you think about it, the things of this world will not be here always, but the one thing, as Christians, we can constantly count on is Christ's love for us. That is never going to go away. He will always love us! How awesome is that?!
Let that sink in, and soak in it for awhile. I know I will be continuing to think about it for a few days.