Psalms 2:10-12 Be wise now therefore, O ye kings: be instructed, ye judges of the earth. Serve the LORD with fear, and rejoice with trembling. Kiss the Son, lest he be angry, and ye perish from the way, when his wrath is kindled but a little. Blessed are all they that put their trust in him.
Revelation 5:12-13 Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing. And every creature which is in heaven, and on the earth, and under the earth, and such as are in the sea, and all that are in them, heard I saying, Blessing, and honour, and glory, and power, be unto him that sitteth upon the throne, and unto the Lamb for ever and ever.
In the beginning of Psalm 2, David points out that the kings of the earth are against the Lord and his "anointed" [Mashiach "Messiah" in Hebrew]. David recognized the true authority of God and advises the kings and rulers of the world, as well as their subjects, to "kiss the Son, lest he be angry." The act of "kissing the Son" would be one of homage to a king, and would indicate submission to the kingship of the Son. Those who are wise will do so before the Son, the Messiah, comes to judge the world!
Men have often tried to appear holy and righteous before other men - but God is seeking those who will worship Him in "spirit and in truth". This reminds me of a story of Francois Fenelon.
In the 17th century, Fenelon was the court preacher for King Louis XIV of France. On one particular Sunday when the King and his attendants arrived at the chapel for the regular service, there was no one else present except the preacher, himself.
"What does this mean?", King Louis demanded.
"I had published that you would not come to church today, in order that your Majesty might see who serves God in truth and who flatters the King," Fenelon replied.
Let's be sure that our worship of God is true and faithful and that we aren't trying to please men in doing so. Serve the Lord with a Godly reverence for who He is, and what His Son has done for you, since He is worthy of your worship, and... He is looking at your heart.