No, it's not a lie. All trinitarians are lost.
Follow the words of Jesus.
John 8:19 Then said they unto him, Where is thy Father? Jesus answered, Ye neither know me, nor my Father: if ye had known me, ye should have known my Father also.
John 8:24 I said therefore unto you, that ye shall die in your sins:
for if ye believe not that I am he, ye shall die in your sins.
John 8:27 They understood not that he spake to them of the Father.
John 10:30 I and my Father are one.
John 14:5 Thomas saith unto him, Lord, we know not whither thou goest; and how can we know the way?
John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
John 14:7 If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.
John 14:8 Philip saith unto him, Lord, shew us the Father, and it sufficeth us.
John 14:9 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?
John 14:10 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 14:11 Believe me that I am in the Father, and the Father in me: or else believe me for the very works' sake.
John 14:16 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;
John 14:17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
John 14:18 I will not leave you comfortless: I will come to you.