Isaiah 6:3-5 (NKJV) And one cried to another and said: “Holy, holy, holy is the Lord of hosts; The whole earth is full of His glory!” And the posts of the door were shaken by the voice of him who cried out, and the house was filled with smoke. So I said: “Woe is me, for I am undone! Because I am a man of unclean lips, And I dwell in the midst of a people of unclean lips; For my eyes have seen the King, The Lord of hosts.”
Isaiah had a vision of the Lord. He saw angels singing and crying out to God, "Holy, holy, holy!" We have only tasted and seen a minute amount of the glory of God. His vast greatness and extreme love for us is unspeakable. If you have not yet experienced the amazing grace of God by spending time alone with Him you are missing a large piece of your relationship with Him.
In the secret place, He will reveal many things to you. As you continue to come to Him with a humble heart, He will show you things that need to change. This is the painful yet peaceful purging process. It is the kindness of God to bring things up at the right time. When He knows you are strong enough with Him to go through it. It hurts during the process but once you let go of the things He has asked, you are lighter and free. You will be able to do more for God because you are emptying yourself of you and being filled up with more of Him. As you encounter God in this new way, you will understand verse 5 in a new way: "Woe is me for I am undone!"
As you get closer to God, the more you want to please Him and any sin you have in your life will become unthinkable to you. Your heart will shift away from the things that are a waste of time and you will yearn for more time with Him. When you become undone, you are experiencing the mercy of God and coming to know who He is in a more intimate way. Desire to know God like you would desire to know a spouse. May your heart cry out for more and more and more of Jesus!