"It is taking up the cross and following"

Sculpture,
Creative Commons Attribution Share AlikeSculpture, "Christ Fallen While Carrying the Cross." Nicola Fumo, 1698. - Credit: Luis GarcĂ­a
Christ used the phrase "take up his cross" metaphorically to illustrate the difficulties inherent in following Him and living a truly Christian life.

Matthew 16:24 (KJV): "Then said Jesus unto his disciples, If any man will come after me, let him deny himself, and take up his cross, and follow me."

Mark 8:34 (KJV): "And when he had called the people unto him with his disciples also, he said unto them, Whosoever will come after me, let him deny himself, and take up his cross, and follow me."

Luke 9:23 (KJV): "And he said to them all, If any man will come after me, let him deny himself, and take up his cross daily, and follow me."