Don’t know if I’ve chosen the right category here: sounds a bit sacreligious.

Did you know that there are two sermons by Jim Elliot, the noble martyr, at Sermon Audio.com?

I have listened to the one on Resurrection and it is full of biblical theology and shows a wonderful grasp of the Bible. Well worth your time.

At the site, you can see the journal entry where he wrote

He is no fool who gives what he cannot keep to gain that which he cannot lose.