It is a sin not to do what one is capable of doing.
Most of us think of pride as self-centeredness, conceit, boastfulness, arrogance, or haughtiness. All of these are elements of the sin, but the heart, or core, is still missing. The central feature of pride is enmity – enmity toward God and enmity toward our fellowmen.
Today I love myself as I love my god: who could charge me with a sin today? I know only sins against my god; but who knows my god?
What we have done, the result of that comes to us whenever it comes, either today, tomorrow, hundred years later, hundred lives later, whatever, whatever. And so, it’s our own karma. That is why that philosophy in every religion: Killing is sin. Killing is sin in every religion.
How shall I lose the sin, yet keep the sense, and love the offender, yet detest the offence?