The question really must be, can any of us live without sometimes being unkind or neglectful to others. Can any of us live through life without ever being unloving to ourselves at some time.
To not sin is to never act unlovingly. Who of us never acts thus. The commandment of God, the basic requirement, taught to us by Jesus, is to ‘love God above all and others as ourselves.’
Can any of us invariably do this?
When Jesus describes the Last Judgement in Mattew 25, verses 31-46, He makes clear that sin is not loving, not caring for others, and even, not caring properly for ourselves.
We’re human, with our own private awarenesses, so we are unlikely never to give in to selfishness that deprives or hurts others.
God has ultimately redeemed us from the effects of our sinfulness. Redemption has become possible instead of impossible through Jesus’ sacrifice. In this way, God has ultimately defeated the power of sin, the consequence of sin that separates us in any way from the great, pure love of God