God, who… made His light shine in our hearts to give us the light of the knowledge of the glory of God in the face of Christ. (2 Corinthians 4:6 NIV)
We stand by revelation, "God who shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ." "God... called me through grace to reveal His Son in me." - Gal. . How are we going to be made to stand, to be established? How is this endurance going to be put in us? By knowing the Lord Jesus in this inward way, by revelation. The people who are going to stand are those in whom this thing has become a living revelation; "God hath shined in our hearts," this is one side. The other is, "pressed on every side, perplexed, pursued, smitten down... yet not unto despair" - 2 Cor. 4:6-10. We are troubled and pressed down... why? "That the LIFE of JESUS might be made manifest in our mortal bodies" - 2 Cor. .
Is not that endurance? Pressed on every side yet not strangled! "In pressure Thou hast enlarged me" - Ps. 4:1. What was meant to be "pressed down," God has made for enlargement. Cast down, yet a wonderful rising up. Why? How? It is "God who hath shined in our hearts... in the face of Jesus Christ," therefore you can go through and survive. Nothing can carry us through but the revelation of the Lord Jesus by the Holy Spirit in our hearts; an inside knowledge of Him - not mental assent to a creed or a doctrine, but a living, vital reality in our very being.