Hebrews 7:19 KJV
For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God.
I believe we can be perfect on Earth. I believe this because of a better hope, hope of Christ’s strength and God living inside us. I have heard preacher’s say we can never be perfect on Earth. Yet the same say we should strive for it. I agree that we should strive for perfection. Where we differ is that I believe it can be attained.
Don’t sin for 10 seconds or 60, 2 hours, or a day. That time is perfection. Ecclesiastes 12:13 KJV Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
If then we perform our whole duty perfectly for a day, strive for another day, and another, one day at a time. Matthew 6:34 KJV Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof.
Not only is Jesus our example, so are Abraham and Job and many others.
James 2:21-22 KJV
Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar?  Seest thou how faith wrought with his works, and by works was faith made perfect?
Job 1:1 KJV
There was a man in the land of Uz, whose name was Job; and that man was perfect and upright, and one that feared God, and eschewed evil.
Jesus was perfect and with faith in God, so can we men also be found perfect. Luke 6:40 KJV The disciple is not above his master: but every one that is perfect shall be as his master.