‘Uncertainly’ translates a Greek compound that means ‘unclearly’, but ‘uncertainly’ is a broader and more acceptable word. Would you run, if you are an athlete, if you could not clearly see where you were supposed to be heading? That is the mean of the Greek word.
What is my life like? Do I have no strategy? Is it a matter of being all out expenditure of energy on recreational things, and exhausted for spiritual things? What sort of a race is that? You sprinted when you should not have run, and you had nothing left when you needed to sprint. We can get it all the wrong way round, lose the technique.
The Christian life is all about destination. What is my destination? In the short term it is holiness and service and witness. Do you keep these things in view? Suppose you receive an invitation to go somewhere, do something. This is going to take up a lot of time and be a regular commitment, and it is something just for pleasure. Do you keep your destination in view? How is this going to affect my destination, my service for the Lord, my personal devotions? How is it going to affect my Christian priorities and my Christian life? It may enhance them for good, or it may wreck them. Maybe I did not even think about that. I have to keep the destination in view, and of course you keep the ultimate destination in view: that great treasure, that eternal reward. ‘I therefore so run, not as uncertainly’ – without an aim.