False trues and beliefs

When I was a teenager, I was not selfish. When my friends needed money, I lend them without thinking if they will give back money to me. Helping them to ride out a storm is the most thing for me. Still, I don't do that from the day I lived in the dormitory of college with some people. These people couldn't conceal their selfishness, arrogance, brashness, boloney, amd waywardness at night.(They could conceal those blemishs in the daytime. Some criminals seem to be good in the daytime, however, they usually commit crimes at night.) Because of that, I am skeptical about the old saying "Seeing is believeing." You only can believe the things you had seen. That's you see some people do good things in daytime, and you believe that they are good people. You can't believe the part you can't see and never see, Like some normal people are abnormal at night. Sorrily, the part you can't see is the most evil part of the world, of a very beautiful haunted house, of a rather kind person. One day, these good people hit you at night and you won't believe your eye.