Faith is invisible and intangible, but faith is the thing we lack the most today. So what exactly is faith?

Even if they are terrorist organizations, they have their own beliefs, although they are spurned by the whole world because they hurt innocent people, so that there are big reasons for not being forgiven.
Our revolutionary martyrs also have their own faith for a better future for the Chinese nation. Eating makes your stomach no longer hungry, and faith makes your spiritual strength stronger. For example, if you have a terminal illness, you need strong faith to bravely fight the disease. When you lose a loved one or friend, it is also faith that sustains you. Even if it is a religious belief, it is a belief.
After watching the movie "Hacksaw Ridge", the male protagonist in the film saved many wounded people in the war with his own faith, and there were even enemies in it, which made people have to admire. Faith is what everyone should have, and those who do not have faith are like no soul, like the walking dead.