WILL WE GO?

I was in amazement, today, as I read in Matthew, concerning Jesus, telling His disciples to go to Galilee. Now, they were in Jerusalem, and Galilee, was some 80-90 some odd mountainous miles north of Jerusalem, and they were just gonna turn around and head back to Jerusalem, so why did they go, in the first place?
Because,Jesus,their Savior, had told them to go!They had enough faith in Him, to know, if He told them to do something,then there was a pretty good reason for doing it!(I'm figuring on "obedience" folks!)
I'm also wondering, why we "hem and haw", and make up all kinds of excuses, for not doing, what God asks us to do?
Why don't we just go ahead and do what He says?
Becky