"“Lord, show us the Father,” said Philip, “and it sufficeth us. Jesus saith unto him, Have I been so long time with you, and yet hast thou not known Me, Philip? he that hath seen Me hath seen the Father; and how sayest thou then, Show us the Father? Believest thou not that I am in the Father, and the Father in Me? the words that I speak unto you I speak not of Myself: but the Father that dwelleth in Me, He doeth the works.” John 14:1-10 . MH 420.1"
"Let not your heart be troubled: ye believe in God, believe also in me. In my Father’s house are many mansions: if it were not so, I would have told you. I go to prepare a place for you. And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also. And whither I go ye know, and the way ye know. Thomas saith unto him, Lord, we know not whither thou goest; and how can we know the way? Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him. Philip saith unto him, Lord, shew us the Father, and it sufficeth us. Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father? Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works."
Ellen White directly references John 14:1-10 in this passage.
"The disciples did not yet understand Christ's words concerning His relation to God. Much of His teaching was still dark to them. Christ desired them to have a clearer, more distinct knowledge of God. MH 420.2"
"Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?"
Both passages discuss the disciples' incomplete understanding of Christ's relationship with God. John 14:9 illustrates this lack of understanding.
"“These things have I spoken unto you in parables,” He said; “but the time cometh, when I shall no more speak unto you in parables, but I shall show you plainly of the Father.” John 16:25 , margin. MH 420.3"
"These things have I spoken unto you in proverbs: but the time cometh, when I shall no more speak unto you in proverbs, but I shall shew you plainly of the Father."
Ellen White directly references John 16:25 in this passage.
"When, on the Day of Pentecost, the Holy Spirit was poured out on the disciples, they understood more fully the truths that Christ had spoken in parables. Much of the teaching that had been a mystery to them was made clear. But not even then did the disciples receive the complete fulfillment of Christ's promise. They received all the knowledge of God that they could bear, but the complete fulfillment of the promise that Christ would show them plainly of the Father was yet to come. Thus it is today. Our knowledge of God is partial and imperfect. When the conflict is ended, and the Man Christ Jesus acknowledges before the Father His faithful workers, who in a world of sin have borne true witness for Him, they will understand clearly what now are mysteries to them. MH 420.4"
"And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance."
EGW references the outpouring of the Holy Spirit on the Day of Pentecost, which is the central event described in Acts 2:4.