By definition, worship is ascribing worth to something or someone. But true worship is also a matter of the heart. It must be felt. It can't be ritualistic. It can't be just an external going through the motions.
True worship is a heartfelt expression of love, adoration, admiration, fascination, wonder, and celebration. It's something that happens in your heart and soul when you begin to praise God for who He is and thank Him for what He has done.

WHY IS WORSHIPPING GOD SO IMPORTANT?
There is nothing difficult about worship. Christian or non-Christian, pagan or holy, every human being was designed to worship, and does worship—something. Consider a group of sports fans watching and talking about a game. They worship. Consider a group of teenagers at a concert. They worship.

We readily worship food, sports, arts, and music. We worship comfort, control, power, achievement, work, money, and relationships, but God calls us to worship Him. He commands it, He desires it, He pursues it, He deserves it, and He will reward it. For God bestows His provision, grace, sovereignty, and power on those who worship Him in spirit and in truth.

But if you choose not to worship God, you need to understand that you are worshipping something else. And whether you worship a job, achievement, money, or a person, you are doing so to your detriment. At some point, the object of your worship will fail to come through for you.


WHAT HAPPENS WHEN WE WORSHIP?
Perhaps the best way to illustrate what happens when we worship is to look at the worship experience of one of God's prophets recorded in Isaiah 6.

In the year that King Uzziah died, I saw the Lord seated on a throne, high and exalted, and the train of his robe filled the temple. Above him were seraphs, each with six wings: With two wings they covered their faces, with two they covered their feet, and with two they were flying. And they were calling to one another: "Holy, holy, holy is the LORD Almighty; the whole earth is full of his glory." At the sound of their voices the doorposts and thresholds shook and the temple was filled with smoke (v.1–4).  First, worship brings an upward look, a glance at God on His throne in all His glory. It refocuses our view of God. It pulls our affections off our idols and puts them onto God. It causes us to remember how good He is, how big, kind, powerful, and loving He is, and how holy He is.

SECOND, WORSHIP BRINGS AN INWARD LOOK.
"Woe to me!" I cried. "I am ruined! For I am a man of unclean lips, and I live among a people of unclean lips, and my eyes have seen the King, the LORD Almighty." Then one of the seraphs flew to me with a live coal in his hand, which he had taken with tongs from the altar. With it he touched my mouth and said, "See, this has touched your lips; your guilt is taken away and your sin atoned for" (v. 5–7).  When you see God for who He really is, as Isaiah did, you start to see yourself for who you really are. You start seeing things in your heart and in your life that really didn't bother you before. But notice that after Isaiah saw and confessed his sinfulness, he also experienced the mercy, grace, and forgiveness of God. That's what happens when you really worship.

But worship doesn't end there.Notice that Isaiah's inward look is followed by an outward look.

Then I heard the voice of the Lord saying, "Whom shall I send? And who will go for us?" And I said, "Here am I. Send me!" (v. 8)  Genuine worship always leads to an outward look—a personal response or action—a desire to be obedient to whatever God calls you to do.

Genuine worship isn't just singing songs and getting a good feeling in your heart. Genuine worship is seeing God for who He really is—His power, His greatness, His holiness, His sovereignty, His love, and His compassion—and then giving Him what He’s worth—the best of your time, your talents, your thoughts, your words, and your deeds.

True worship is seeing afresh the tremendous worth of God and, in response, giving Him the best of everything you have.

SOME VERSES ON WORHIPS
Psalms 29:2 
Ascribe to the LORD the glory due his name; worship the LORD in the splendor of holiness.

Psalms 95:6
Oh come, let us worship and bow down; let us kneel before the LORD, our Maker!

Psalms 99:5
Exalt the LORD our God; worship at his footstool! Holy is he!

Psalms 134:2
Lift up your hands to the sanctuary And bless the LORD.

Psalms 63:4
So I will bless You as long as I live; I will lift up my hands in Your name.

Psalm 100:1-5
Shout for joy to the LORD, all the earth.  Worship the LORD with gladness; come before him with joyful songs.  Know that the LORD is God. It is he who made us, and we are his; we are his people, the sheep of his pasture.  Enter his gates with thanksgiving and his courts with praise; give thanks to him and praise his name.  For the LORD is good and his love endures forever; his faithfulness continues through all generations.

John 4:21-24
Jesus said to her, “Woman, believe me, the hour is coming when neither on this mountain nor in Jerusalem will you worship the Father. You worship what you do not know; we worship what we know, for salvation is from the Jews. But the hour is coming, and is now here, when the true worshipers will worship the Father in spirit and truth, for the Father is seeking such people to worship him. God is spirit, and those who worship him must worship in spirit and truth.”

1 Timothy 2:8
Therefore I want the men in every place to pray, lifting up holy hands, without wrath and dissension.