"Note the implication here — to say that Christ 'ascended' means that he must previously have 'descended,' that is from the height of Heaven to the depth of this world. The one who made this descent is identically the same person as he who has now ascended high above the very Heavens — that the whole universe from lowest to highest might know his presence." Ephesians 4:9,10
What an amazing picture of the Incarnation and Ascension! Jesus, the One who so humbled Himself that He’d leave His throne and be born into squalor, is the very same One who has now ascended and retaken that throne. You and I are the privileged ones now tasked with making His “presence” known to others; in fact, to “the whole universe.”
Andrew Murray paints this beautifully in The Holiest of All: The Resurrection occurs; forty days pass; Jesus ascends; then, ten days later, come the events of Pentecost. Murray’s assertion is that the Holy Spirit had witnessed the activity and glory of Jesus’ return-to-Heaven and then came to bear witness from within us to that glory.
That is what your day is "for" today. Now let's go live it to the full.