Harm - Words used in A Course in Miracles

  Truth, made by God, whole and eternal, cannot be harmed, and that any action that denies this by seeking to “protect” it, is really fear “protecting” illusion.

Defenselessness is strength. It testifies to recognition of the Christ in you. ... choice is always made between Christ's strength and your own weakness, seen apart from Him. Defenselessness can never be attacked, because it recognizes strength so great attack is folly ... Defensiveness is weakness. It proclaims you have denied the Christ and come to fear His Father's anger. ... What but illusions could defend you now, when it is but illusions that you fight? W-153.6.7.

If you use the body for attack, it is harmful to you. If you use it only to reach the minds of those who believe they are bodies, and teach them through the body that this is not so, you will understand the power of the mind that is in you. If you use the body for this and only for this, you cannot use it for attack. In the service of uniting it becomes a beautiful lesson in communion, which has value until communion is. T-8.VII.3:1-4