“Blessed are the pure in heart, for they shall see God. (Mt 5:8)”
The organ for seeing God is the heart. The intellect alone is not enough.
The ascent to God occurs precisely in the descent of humble service, in the descent of love, for love is God’s essence, and is thus the power that truly purifies man and enables him to perceive God and see him. In Jesus Christ, God has revealed himself descending: “Though he was in the form of God” he “did not count equality with God a thing to be grasped, but emptied himself, taking the form of a servant, being born in the likeness of men… He humbled himself and became obedient unto death, even death on a cross. Therefore God has highly exalted him” (Phil. 2: 6-9)
Those words mark a decisive turning point in the history of mysticism. They indicate what is new… which comes from what is new in the Revelation of Jesus Christ. God descends, to the point of death on the Cross. And precisely by doing so, he reveals himself in his true divinity. We ascend to God by accompanying him on this descending path.
Jesus of Nazareth, Vol I. (emphasis mine)