Holy means exalted or worthy of complete devotion, as one perfect in goodness and righteousness.  God’s holiness is not simply the best we know made infinitely better.  God is absolutely untainted. His holiness stands apart—unique and incomprehensible.

Isaiah 6:3

And one called out to another and said,
“Holy, Holy, Holy, is the LORD of hosts,
The whole earth is full of His glory.”

1 Peter 1:15-16

…but like the Holy One who called you, be holy yourselves also in all your behavior; because it is written, “YOU SHALL BE HOLY, FOR I AM HOLY.”

Revelation 4:8-11

And the four living creatures, each one of them having six wings, are full of eyes around and within; and day and night they do not cease to say, “HOLY, HOLY, HOLY is THE LORD GOD, THE ALMIGHTY, WHO WAS AND WHO IS AND WHO IS TO COME.” And when the living creatures give glory and honor and thanks to Him who sits on the throne, to Him who lives forever and ever, the twenty-four elders will fall down before Him who sits on the throne, and will worship Him who lives forever and ever, and will cast their crowns before the throne, saying, “Worthy are You, our Lord and our God, to receive glory and honor and power; for You created all things, and because of Your will they existed, and were created.”

Holy also means that God is without any sin. Are we as people without any sin? No, only God is without any sin!  God calls us to be holy, as He is holy… and we can only do that through Him.

Lord, please help us to be holy as You are holy.