Self confidence is a most poweful weapon to combat enemy

I have three strange enemies
The first one is a mind reader
He keeps eye on my eye to plot me
He studies the flame burning in it
He assesses the thickness of the flicker
He wants to attack when the look gets cold

The second one is a muscle reader
He always keeps eye on my stick
He tries to find a way to measure it
He wants to assess how hard it can beat
He wants to attack when its size diminishes

The third is a mouth reader
He tirelessly follows my words
He constantly puts them on scale
He weighs them from time to time
He wants to attack when they lose power

But in the face of my enemy
I shall have my eye always strong
I shall have my stick always big
I shall have my word always powerful