'Requires' in the Bible

If anyone is meant for captivity, into captivity he will go. If anyone is to be killed by the sword, then by the sword he must be killed. This requires steadfast endurance and faith from the saints.

And he requires everyone—small and great, rich and poor, free and slave—to be given a mark on his right hand or on his forehead,

This requires the steadfast endurance of the saints -- those who obey God's commandments and hold to their faith in Jesus.

(This requires a mind that has wisdom.) The seven heads are seven mountains the woman sits on. They are also seven kings: