Everybody Sins

Jesus cried out from the cross, "Father, forgive them; for they do not know what they are doing."

Today, in the Church Age, if we are going to be for real, we must admit that Christians know what we are doing, and we sin anyway.  Thanks be to God that He has provided a way for us to be restored to fellowship with Him.  If we repent and turn away from the sins we have committed, then God forgives us:

If we say that we have no sin, we are deceiving ourselves and the truth is not in us.  If we confess our sins, He is faithful and righteous to forgive our sins and to cleanse us from all unrighteousness. If we say that we have not sinned, we make Him a liar and His word is not in us.

My little children, I am writing these things to you so that you may not sin. And if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous;

and He Himself is the propitiation for our sins; and not for ours only, but also for those of the whole world.

By this we know that we have come to know Him, if we keep His commandments.

The one who says, "I have come to know Him," and does not keep His commandments, is a liar, and the truth is not in him;

but whoever keeps His word,

in him the love of God has truly been perfected.

By this we know that we are in Him:

the one who says he abides in Him ought himself

to walk in the same manner as He walked.

(1John 1:8-10, 2:1-6 NASB)

https://www.biblestudytools.com/nas/1-john/2.html