The Father, Son, and Holy Spirit are seperate and distinct, yet one in essence. There is one God revealed in three distinct persons making up the One God. Do you only worship the Father, and not the Son or Holy Spirit? Here is a reference to the Trinity from historical Christianity from the most accepted Protestant Confession of Faith. The Roman Catholic and Orthodox view would be the same in regards to the Trinity. If you click on the blue numbers, the scripture references will pop up. The rejection of the Trinity has always been declared heretical through the history of the church.
Chapter II
Of God, and of the Holy Trinity
I. There is but one only,
[1] living, and true God,
[2] who is infinite in being and perfection,
[3] a most pure spirit,
[4] invisible,
[5] without body, parts,
[6] or passions;
[7] immutable,
[8] immense,
[9] eternal,
[10] incomprehensible,
[11] almighty,
[12] most wise,
[13] most holy,
[14] most free,
[15] most absolute;
[16] working all things according to the counsel of His own immutable and most righteous will,
[17] for His own glory;
[18] most loving,
[19] gracious, merciful, long-suffering, abundant in goodness and truth, forgiving iniquity, transgression, and sin;
[20] the rewarder of them that diligently seek Him;
[21] and withal, most just, and terrible in His judgments,
[22] hating all sin,
[23] and who will by no means clear the guilty.
[24]
II. God has all life,
[25] glory,
[26] goodness,
[27] blessedness,
[28] in and of Himself; and is alone in and unto Himself all-sufficient, not standing in need of any creatures which He has made,
[29] nor deriving any glory from them,
[30] but only manifesting His own glory in, by, unto, and upon them. He is the alone fountain of all being, of whom, through whom, and to whom are all things;
[31] and has most sovereign dominion over them, to do by them, for them, or upon them whatsoever Himself pleases.
[32] In His sight all things are open and manifest,
[33] His knowledge is infinite, infallible, and independent upon the creature,
[34] so as nothing is to Him contingent, or uncertain.
[35] He is most holy in all His counsels, in all His works, and in all His commands.
[36] To Him is due from angels and men, and every other creature, whatsoever worship, service, or obedience He is pleased to require of them.
[37]
III. In the unity of the Godhead there be three Persons of one substance, power, and eternity: God the Father, God the Son, and God the Holy Ghost.
[38] The Father is of none, neither begotten nor proceeding; the Son is eternally begotten of the Father;
[39] the Holy Ghost eternally proceeding from the Father and the Son.
[40]
Westminster Confession of Faith
John 14:9:
Jesus answered: "Don't you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, 'Show us the Father'?
John 10:38:
But if I do it, even though you do not believe me, believe the miracles, that you may know and understand that the Father is in me, and I in the Father."
Here is the link to the Catholic view of the Trinity:
CATECHISM OF THE CATHOLIC CHURCH - TABLE OF CONTENTS