You don't put on the the whole armour of God in the day the devil attacks.
You put it now even when even everything is going well.
Ephesians 6:13 Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
Soldiers don't train in the battle, they train even when there is total peace and no sign of adversity!!!