“Jesus saith unto him, Thou hast said: nevertheless I say unto you, Hereafter shall ye see the Son of Man sitting on the right hand of Power, and coming in the clouds of heaven.” Matthew 26:64 (KJV)
The words Jesus speaks above are during His trial, and are asked by the high priest concerning whether He was the Christ the Son of God.
On the day of His death He declares He will be returning, and all who do not know Him should be prepared for His coming.
The question are – Are you with Him? or Are you against Him? If you are against Him you will fall.