Holy
Holy simply means "separate" or "set apart." Because God is holy, he also wants us to be holy - to be set apart from the world, chosen to serve him and to be blessed by him.

God is Holy.
Leviticus 10:3; 19:2; 22:32
Psalm 99:9
Isaiah 6:3
Revelation 4:8
God makes his followers "holy" - they are "set apart" for a special purpose.
Exodus 19:5-6
Deuteronomy 7:6; 14:1-2,21; 28:9
Ephesians 5:25-27
Hebrews 13:11-12
1 Peter 2:5,9
God commands his followers to be holy.
Leviticus 11:44-45; 19:2
Ephesians 4:22-24
1 Peter 1:15-16
The temple is a holy place.
1 Kings 8:6-8
1 Chronicles 6:49
Hebrews 9:2-3,8,12,25; 10:19