I'd like to chime into the conversation to add what I've learned through orthodoxy. The church views sin differently than in Protestantism in that sin is something that strays us further from the Eucharist or path to being closer with Christ our God or rather is due to us straying from it. We are led into temptations of the flesh and we ask Christ to forgive us of our transgressions both known and unknown.
When talking to my priest regarding this subject during a coffee hour he had mentioned that we are compelled to do such things when in moments we are not filled with the Holy Spirit or when we are straying too far from it, so a man that strays from the Holy Spirit is more inclined to do bad things. This is a more mystical approach to it but find it fall in line with my first point of straying from or being strayed from the Eucharist.
Be the bee has a good discussion on this:
https://www.youtube.com/watch?v=hduyBIB4n0QAnother great resource: https://slife.org/sin-definition-for-christians/
John 1:8-10 covers the subject quite well:
8 If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. 10 If we say that we have not sinned, we make Him a liar, and His word is not in us.
Also
John 3:6-8:
4 Whoever commits sin also commits lawlessness, and sin is lawlessness. 5 And you know that He was manifested to take away our sins, and in Him there is no sin. 6 Whoever abides in Him does not sin. Whoever sins has neither seen Him nor known Him.
I plan sometime soon to visit my local monastery to ask one of the monks to better understand this myself as they may have a different answer to this. I hope that what I said helps somewhat although it may be a bit confusing if you're unfamiliar with some orthodox terminology.