The sons of Reuben, the Gadites, and the half-tribe of Manasseh were valiant men. They were described as skillful in battle. They were in a pitched battle with a larger army.
Look at 1 Chronicles 5:14.
They were helped. They were skillful but in the midst of the battle they cried out to God. They were helped not because of their skill, but because in the midst of that for which they had trained, that for which they had great skill, they trusted in Him.
It is imperative that we steward our skill. It is not an accident that the Lord has given us the experience and gifts with which we are equipped. We are to continue to hone and refine and learn – become ever more skillful.
When that skill converges with the task for which the Lord has designed us, Ephesians 2:10, it would be easy to trust in His training, His shaping our lives, the experience through which He has brought us, but that would be a grave error. As the sons of Reuben, the Gadites, and the half-tribe of Manasseh we need to cry out to God, in the midst of doing that for which He has given us skill, that for which we have trained, we need to trust in Him.
He is our help.