This expression is often heard in regard to physical exercise, when the idea is being promoted that muscles have to be used in order to insure greater use of them in the future. To fail to do so, will tend to slowly lead to muscular atrophy, a loss of what strength you presently have. But the same principle applies to things spiritual as well.
In Mark 4:24-25, Jesus says, "Take heed what you hear. With the same measure you use, it will be measured to you; and to you who hear, more will be given. For whoever has, to him more will be given; but whoever does not have, even what he has will be taken away from him." When it comes to hearing God's word, understanding it and then applying it, God warns in so many words, "use it or lose it."
We all have some ability to get to know God and His will. We all have opportunities to fulfil the desires of our heart religiously, but if we neglect to use them, we may end up losing even that which we have. Conversely, the more we put into seeking after God, the more we will get out of it and the more we will be equipped for future success.
Ecclesiastes 12 warns mankind to remember the Creator in the days of youth, before the evil days come and there is no interest. We go through changes in our lives, and some not for the better. One such change may be a degenerating interest in spiritual concerns. Don't let this happen to you. Use it, so you don't lose it.
- by Whit Sasser