Did Jesus Teach That The Earth Is Flat?

 (Mark 13:27)"And then he will send out the angels and gather his elect from the four winds, from the ends of the earth to the ends of heaven." (ESV) 

Some have tried to use this verse as evidence that the Bible teaches a flat earth.  But Jesus is obviously using symbolic language to say he will gather his elect from everywhere.  Jesus has perfect knowledge of the earth, he created it (John 1:1-3).