Success Takes Steps

Would I follow behind,
Someone who promises success.
And has of yet been tested?

Or would I select to stay,
By the side of someone I know...
Who has shown their best,
Under duress and has made mistakes?
And has revealed flaws.
To prove success takes steps,
With expectations of disappointments?

Well...
You may not agree,
But that answer is easy for me.
Since I know nothing is guaranteed.
And someone who makes promises,
WITH a guarantee?
I wouldn't trust if they held a magic wand.