Our attitude towards the world around us depends upon what we are ourselves. If we are selfish, we will be suspicous of others. If we are of a generous nature, we will be likely to be more trustful. If we are honest with ourselves, we won't always be anticipating deceit in others. In a sense, looking at the people around you is like looking in a mirror. You see a reflection on yourself.
Secret of a happy life - an attitude of unselfishness. But many can tell you that you will be taken advantage of if you begin to live for others but i strongly believed in "you lose few but gain many". There's nothing perfect on earth. You choose who you are!