Let’s look at the usefulness of looking for strength from a higher power. When we look to a higher power for our strength we can be strong, but when this power is dogmatised, and classified it becomes a belief, all to answer where did we get the strength from when such, and such happened, and when that happens we no longer have the belief we can do things without this powers help, so if we loose our faith in this being we created we loose our ability to cope as we could before our belief formed so I don't think it is useful as it can and in the majority of cases does distort our view of our abilities, of our strengths, and our mind.
With taking away our ability to trust our own abilities, and mind, we lose our trust in ourselves and when that happens progress stops, or goes at a snails pace, as is shown in history when the church controlled information until the tide of knowledge got too strong.
We don’t need a higher power or a prophet to show us the way and give us strength what we need is to trust in ourselves to be able to find the truth and have the strength, and this will give our life meaning.
When we let fear control us we have no control, but when we look at what is causing us fear, the fear looses its hold, and we become stronger.
At the end of the day I may be right, I may be wrong, but I share this hoping I am one or the other.