what is belief?I always remember the topic from time to time

what is belief?
I always remember the topic from time to time that was relevant to our belief which was discussed by a group of my classmates on that day.nowadays,I often inquiry myself what is belief on earth in my heart.To tell the truth,I can hardly find out something to describe this kind of feeling that was so abstract and invisible in our life.However,in other words,we can not deny the truth that we have experienced multiple sufferings and griefs in our life and then become more mature and know more about our life.but my friend,have you ever contemplate the question and what is your backbone when you run into plight?May which is a sort of belief for you at that moment and the belief helped you to conquer hardships and difficulties.My friends,do you agree with me?I am also looking forward to sharing your belief?