"Never be lacking in zeal, but keep your spiritual fervor, serving the Lord." -- Romans 12:11
When I was growing up I played football and soccer. We always looked forward to game day. Practices were not as much fun or exciting. We were driven by our coaches to built our stamina and skill. To win on game day, we needed to maintain our fervor.
The spiritual life is no different. We all want to do the fun ministry activities. But if we don't practice by performing spiritual disciplines, we'll never build stamina. The Lord wants us to have energy and zeal in the second half of our lives. To win the race set before us by the Lord, we need to maintain our fervor.
You may be excited about preaching, witnessing and counseling those in need. But if you hope to keep your zeal over the years, you need stamina. Make quality time to pray and read the Scriptures every day. Listen to the voice of God and nurture a deeper walk with him through discipline. Get back to the basics of your spiritual life and then you will have the fervor to win.