1- Because we need to hear the truth from a reliable witness and Jesus being who he is can be the most trusted withness.
2- Jesus as the faithful witness encourges us from the work he has performed for us by dying on the cross and by his resurrection. And becuase he is God.
3- We are afraid to be a clear withness because Christians are looked down upon and we are made fun of. You see it now on tv and in the newspapers. This is an ungodly world where it is not "in" if you believe in Jesus. You are "in" if you believe in withcraft and do drugs etc.
JESUS IS LOVE