What makes a true worshipper is not where you worship, but who you worship, and how you worship. Verse 23 says true worshippers will worship the Father, which answers the ‘who’. And Jesus says in Verse 24 that they will worship the Father in Spirit and in Truth, which answers the ‘how’.
Let’s focus on these two vital aspects of worship - spirit and truth.
Worshipping God in spirit refers to the nature of our worship. This is worship that emanates from the spirit and must be propelled by the indwelling Holy Spirit, flowing from the inside and expressed outwardly.
In our circles it is so easy to go through the outward motions. People might think that you are a true worshipper when you lift up your hands, bowing down, clapping or dancing. And there is nothing wrong with that. I believe we should express our worship outwardly, but it must begin from the heart. In Matthew 22:37-38 Jesus says you should love the Lord your God with all your heart, mind, soul and strength. It must start in your heart and not just be an outward show.
In Mark 7:6-7 Jesus says "they worship me only with their lips but their hearts are far away from me|”. Jesus is speaking of a kind of worship which comes to nothing – "In vain they worship me.”
In vain means empty; it also means fruitless and ineffective.
1 Corinthians 14:15 speaks of singing with the spirit, but also singing with understanding. It is vital to pray in the spirit, but also pray with understanding. Do not worship God from an empty heart or head. Psalms 47:7 "For God is the King of all the earth: sing ye praises with understanding”.
I believe worship to God should be insightful, so your understanding has a role to play when worshipping Him. If you want to worship God in truth, you must have some knowledge of Him. You cannot be a true worshipper unless you know the truth about the one whom you worship. You are not called to be a lazy worshipper, but a zealous one who seeks to find out the truth about God.
Jeremiah 9:23-24 Thus saith the Lord, Let not the wise man glory in his wisdom, neither let the mighty man glory in his might, let not the rich man glory in his riches: But let him that glorieth glory in this, that he understandeth and knoweth me, that am the Lord which exercise loving kindness, judgment, and righteousness, in the earth: for in these things I delight, saith the Lord.