Psalm 90:12 Teach us to number our days, that we may gain a heart of wisdom.
Consider the sort of request to make – to be taught. The verse begins Teach us. This sort of thing comes up often in the psalms. A request for teaching assumes ignorance on our part and that is right. By nature we don't know how to live. We need to learn how to do that. Who better to teach us that than God himself. When serious people who know what they are doing go off to university, they find out who are the best teachers and apply to those universities. The best teacher of all is God himself. Go to him and learn. Here then is something we need to learn, something we need to learn from God. It may well not come easy but we must learn it anyway. God is able to teach us.
Understand what it is that Moses wants God to teach us – to number our days. So what is it that Moses wants to learn from God? He asks that we will learn to number our days. We learn to count when we are very young. We start with addition then substraction then move on to multiplication and division. Next come fractions and equations. The highest mathematics there is, is learning to number your days. We need to learn to number our days. What does that mean? He has spoken about death and the brevity of life and the regular manifestations of God's wrath against the people. Every person has only a limited time here on this earth. We may live 70 years or 80. However old we get, we die. What Moses requests then, and it is something that we should all seek, is that we may be able to have the right approach to our lives. It is not that we forget about the past completely but that we focus on the day ahead. He is not asking to know how long he has left but to be able to discern how quickly the days pass, the fact that death can come at any time and that life on earth will certainly end at some point. No doubt he also has in mind that judgement that follows death. If we are to number our days as we ought to then we'll be aware of the coming judgement and we'll order our days in the light of the coming judgement. You read sometimes of people who have managed to lose millions. They once were rich but now they are poor. How does it happen? Probably not overnight. Usually it is little by little. In the same way, we learn to live wisely little by little, day by day. Here is a good prayer for all of us. Ask God to teach you, to help you understand how to live – not thinking we have all the time in the world but realising life passes by quickly and death can call at any time. Ask him to help you prepare for the coming judgement in the right way.