What does it mean to be a follower of Christ in today's world?  The same thing it meant in the day of the disciples.  When Jesus walked the earth, that was their "today's" world.  We can only follow Him in the time in which we live, so the requirements never change.  We are to love God with all our heart and love our neighbor as ourself.  Sometimes I hear people talk about how wonderful it would have been to have lived in Jesus' time, but He told the disciples He had to go away, but He was sending One greater to be with them, the Holy Spirit to dwell in their heart.  It was only after the Holy Spirit came that the disciples began to do great things, in the world in which they lived.  It was the only world they had,and today is the only world we have.  So, for us as for the disciples, it means we follow the directions of the Holy Spirit.