What Makes A Ritual Sucessful? Options

From one day to the next sucess in ritual seems to have its own temperment, seems as though a sucessful practice can't fail, could well sit on hot coals and practice and nothing would bother you to then practice the next day under the same conditions shuffling to find comfort in an asana, distracted by the pattern of dry paint on your wallpaper.

Why?

Was going to ask if anyone, perhaps an adept could vouch for 100% efficiancy or nearby in their practice, perhaps knowing just when to commit to an operation or to being so in control of their faculties that invoking/evoking is akin to using a can opener or a bottle of milk each day. To see if that level of profession can be reached or if its all some hit and miss wet to dry affair.

Guess the real question is, what makes a pro a pro?

Peace
.M.

I'm actually going to answer a different question, namely, how will you know if your ritual is successful? In my experience, a well-performed ritual ALWAYS includes an element of surprise, meaning that something unexpected happens. For example, I was once performing an outdoor ritual. The weather was heavy overcast, nothing but solid low clouds. At the apex of the ritual, the clouds parted in a circle just big enough to disclose the full moon in all it's splendor. It remained so for about two minutes before the clouds obscured it again.