The Battle while Praying

I am working on being an effective
prayer warrior, sometimes when I pray
my mind strays off-topic, and I’ll lose focus
if I’m not careful, the devil will take it over
and plant many unpleasant images there;
there’s a spiritual battle going on for my life,
and weak prayers get intercepted by demons.

The Lord's Prayer Matthew 6:9-13 (KJV) 

9 Our Father which art in heaven, Hallowed be thy name.
10 Thy kingdom come, Thy will be done in earth, as it is in heaven.
11 Give us this day our daily bread.
12 And forgive us our debts, as we forgive our debtors.
13 And lead us not into temptation, but deliver us from evil: 
For thine is the kingdom, and the power, and the glory, for ever. Amen.