The Call of the Cross

Christ’s crucifixion on the cross and His resurrection bring us to a place of oneness with God.
Christ’s death and resurrection make it possible for us to be reconciled, at one with, God.
So what happened at the Cross?  What was Jesus experience at the Cross and what should our experience at the cross be?  What does it mean to take up our cross daily and follow Christ or in Philippians 3  to know Christ—yes, to know the power of his resurrection and participation in his sufferings, becoming like him in his death, 11 and so, somehow, attaining to the resurrection from the dead?
How does the Cross of Christ call to us today and to what does it call us?