Praise the Lord with a Life of Holiness
The Lord God created the cherubims to praise Him constantly. They do not rest, but they constantly praise the Lord. Heaven does not have night or day because no darkness existed in heaven. Hence, time, as we experience it on earth is not the same in heaven.
Humans do not have the stamina or strength to praise God as He deserved. We can only praise Him by living a holy life that is pleasing to Him.
The four living creatures, each having six wings, were full of eyes around and within. And they do not rest day or night, saying:
“Holy, holy, holy,
Lord God Almighty,
Who was and is and is to come!” (Revelation 4:8)