We sin knowingly unknowingly but GOD is watching us. He keeps record of everything. Too many births is a disaster, read somewhere. It means we take rebirth as we have karma pending to be delivered before we ultimately achieve moksha.
We must pray at-least thrice a day meaning have a conversation with GOD daily. We must seek forgiveness from GOD and express gratitude for everything we have. When we neglect seeking forgiveness, we are allowing our karmas getting piled up in our karmic books of record. But if we seek forgiveness from time to time, GOD acknowledges our repentance. How much credit you have in your spiritual bank account and your clear conscience is what defines your personal relationship with GOD. Keep building your credit through naam, seva and daan, service to humanity is service to GOD.