'Struggle' in the Bible

because our struggle is not against blood and flesh, but against the rulers, against the authorities, against the world rulers of this darkness, against the spiritual [forces] of wickedness in the heavenly [places].

having the same struggle which you saw in me and now hear about in me.

For I want you to know how great a struggle I have on behalf of you, and those in Laodicea, and all those who have not seen my face {in person},

But remember the former days in which, [after you] were enlightened, you endured a great struggle with sufferings,

You have not yet resisted to the point of [shedding your] blood [as you] struggle against sin.