2 Peter 3:3&10 – First of all, you must understand that in the last days scoffers will come, scoffing and following their own evil desires. They will say, “Where is this ‘coming’ he promised? Ever since our fathers died, everything goes on as it has since the beginning of creation.” But the day of the Lord will come like a thief. (NIV 1978)
My Musings – The promise will be fulfilled. The scoffers may cause many to stop looking and to be less vigilant in their expectation. It is when the guard is down and he is unexpected that the “thief” comes.
My Advice – Do not be dismayed when people say such things. It is not an indication that Jesus is not returning, rather it is a sign that the day is rapidly approaching.