YHWH - Jehovah - God
For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book. Revelation 22:18-19 
Notice the word “LORD” in capital letters written in the Bible means יהוה, in Hebrew YHWH, and translated into English as “Jehovah.
The name Yahweh means “He who was, and is, and will ever be come.” Yahweh is ever-living, the only One whose life derives solely from within Himself. In short, He has no beginning, nor does He have an end. He is eternal, ever-existing. As far as eternity reaches back in to the past, and stretches into the future, there I AM.
The reason why many don’t use God’s personal name is because they don’t know about it. In old manuscripts the divine name appears more than 7000 times. However, many bible translations have removed the name and replaced it with titles such as GOD or LORD.
Psalm 25:14
Darby Holy Bible Translation
The secret of Jehovah is with them that fear him, that he may make known his covenant to them.
World English Bible
25:14 The friendship of Yahweh is with those who fear him. He will show them his covenant.
King James Version
25:14 The secret of the LORD is with them that fear him; and he will shew them his covenant.
You Chose
Now the Holy Scriptures tells us that, the YHWH will teach and lead us into all truth. He will speak to us in our hearts teaching us His Word, He will show us which scriptures are from Him, and will make us feel very uneasy when we come up against man made scriptures, which have altered His Word.
1John2v 27, says “ but the anointing which ye have received of Him abideth in you, and ye need not have any man teach you.”
Now even the very young to the very old shall know the Word of the Lord, for the Lord abideth in them, and as Jesus has said, “ He will lead you into all truth.
